What nobody tells you about perimenopause: the symptoms that blindsided me

I was 39 the first time I noticed something was different.

Not dramatically different. Not in a way I could have pointed to and named. Just a quiet accumulation of things that didn't quite add up: a sharpness in my mood that felt foreign, anxiety without a reason, sleep breaking in the night for no obvious cause, and a flatness on certain days I couldn't explain away with tiredness or stress.

A sharpness in my mood that felt foreign.

Anxiety that arrived without a reason.

Sleep started breaking in the middle of the night for no obvious cause.

A flatness that settled in on certain days that I couldn't explain away with tiredness or stress.

I didn't think of perimenopause. At 39, I thought I was too young. Perimenopause was something that happened to women in their 50s, women who looked like my mother, not me. I was too young.

I told myself I was just overwhelmed and needed to manage stress better, sleep more, and drink less coffee. So I explained it away. One thing at a time. For years.

It wasn't until I was on a WhatsApp video call with my mum and sister in Italy, describing a cluster of symptoms including bloating that had become relentless, that my mum's face changed on the screen. She looked at my sister and then back at me and said, almost matter-of-factly: "That's perimenopause."

I was 41. I had probably been in perimenopause for two years already without knowing it.

This post is for every woman who is doing what I did. Explaining things away, one by one. Telling herself she's too young, too stressed, too much of something else. Missing the pattern because nobody gave her the full picture.

This is the full picture you need to see. Or at least, the parts nobody tells you.

Perimenopause Starts Earlier Than Most Women Think

Most women have a picture of menopause that looks like their mother or grandmother. A woman in her mid to late 50s, with hot flushes and the end of periods. That picture isn't exactly wrong, but it's incomplete: it overlooks how long the lead-up actually is.

Perimenopause, the transitional phase before menopause, can begin anywhere from eight to ten years before your final period. For some women, that means their late 30s. For many, it means their early to mid-40s. The average age of menopause in Australia is 51, which means the average woman begins perimenopause in her early to mid-40s at the latest, and often earlier.

I started having symptoms at 39. I am 44 now. I have been navigating this transition for five years, most of which I spent not knowing that's what it was.

If you are in your late 30s or early 40s and something feels different, do not ignore it just because of your age. Symptoms matter more than age here. A simple place to start is a symptom journal, just a few weeks of writing down anything unusual, even if it seems small or disconnected. Bringing that record to a trusted healthcare provider can help you have a more informed conversation, and it can be the beginning of finding real answers.

Age is one of the least reliable indicators of whether perimenopause has begun.

Symptoms, not age, are your most reliable guide.

Perimenopause Symptoms Nobody Warns You About

Hot flushes and irregular periods are the symptoms everyone associates with perimenopause. They are real and common. But these are often not the first or most disruptive symptoms for many women. Here are the ones that blindsided me, and the ones I hear about most often from women who had no idea perimenopause was the explanation.

The first symptom I want to highlight is anxiety that comes from nowhere. Not situational anxiety, not worry about something specific, but a free-floating unease that arrives without a trigger and sits in your chest without explanation. For me, it showed up in my early 40s and felt completely disconnected from my life. I thought something was wrong with my mind. It was my hormones.

Estrogen has a significant effect on the brain's stress response and mood regulation. As it fluctuates in perimenopause, anxiety can spike in ways that feel entirely psychological but are rooted in biology. This is one of the most commonly missed symptoms because it looks like a mental health issue rather than a hormonal one. Many women are prescribed antidepressants or anti-anxiety medication before anyone asks whether their hormones might be involved. I almost was.

Another particularly challenging symptom is rage. Not irritability. Rage. The disproportionate, frightening kind that arrives over something small and leaves you wondering who you just were. Not a personality change, a hormonal one.

Progesterone, which has a naturally calming effect, becomes unpredictable in perimenopause. When it drops, the buffer between you and your own reactions gets thinner. Women describe this as one of the most distressing symptoms because it affects their relationships and their sense of self.

You are not becoming a different person.

Your progesterone is fluctuating.

Next comes brain fog. The inability to find words mid-sentence. Walking into a room and having no idea why. Reading the same paragraph three times. A quality of mental slowness or fuzziness that is alarming when you are used to being sharp.

Estrogen supports cognitive function, memory, and processing speed. As it fluctuates, so does the clarity of your thinking. This symptom is particularly confronting for women in demanding careers who have always relied on their mental agility. It is not early dementia. It is perimenopause.

Sleep disruption is another key change many notice. Waking at the same time every night, often between 2 am and 4 am, completely alert and unable to get back to sleep. I wrote about this in detail in another post because it was one of my most significant symptoms. For years, I thought I had insomnia. I had hormonal disruption affecting my cortisol rhythm and my sleep architecture. The distinction matters because the solutions are different.

Joint pain is another frequently missed symptom. Estrogen has anti-inflammatory properties, and as it declines, joints that were never a problem can start to ache. Knees, hips, fingers, wrists. Women describe it as feeling suddenly older than they are. It is often dismissed as the natural result of ageing rather than recognised as a hormonal symptom with a hormonal solution.

Bloating and digestive changes also surprised me. This was the symptom that started my own conversation with my mum. Estrogen affects gut motility and the gut microbiome, and as it shifts, digestive symptoms that never bothered you before can become persistent and confusing: bloating, changes in bowel habits, food sensitivities that seem to appear out of nowhere.

Another unsettling symptom is heart palpitations. A racing or fluttering heart that arrives without exertion or obvious cause. Frightening enough that many women end up in emergency departments having cardiac investigations that come back clear. Estrogen affects the cardiovascular system, and fluctuations can cause benign but alarming palpitations. If you have had your heart checked and been told everything is fine, perimenopause is worth considering.

Hay fever and histamine intolerance caught me off guard as well. Suddenly sneezing through spring when you never had allergies before. Reacting to wine, aged cheese, or fermented foods in ways you never used to. Waking up congested for no reason. These are not random new allergies. There's an emerging understanding that estrogen regulates histamine receptors, and histamine in turn stimulates estrogen production. When estrogen fluctuates in perimenopause, histamine levels can spike unpredictably, and the result is an immune system that starts behaving as if everyday substances are threats.

Wine intolerance is one of the most commonly reported and least explained symptoms I hear from women in this community. One glass that used to be fine now brings flushing, headaches, or a racing heart.

It is not that your relationship with wine has changed.

It is that your histamine threshold has.

The Perimenopause Symptom Nobody Talks About Honestly

I want to include this one separately because it is almost never mentioned, and because understanding it changed how I thought about my own experience of pleasure.

As estrogen declines, the tissue of the vulva, the clitoris, and the vaginal walls begins to change. It becomes thinner, less elastic, and less responsive. The clitoris, which is far larger internally than most of us were ever taught, depends on estrogen for blood flow and tissue health. As estrogen drops, sensation in this area can diminish. The touch that used to register clearly can start to feel muted, and the pathway between stimulation and pleasure can become less reliable.

This is one of the reasons a gentler tool like Inara can help, not to fix anything, but to reintroduce reliable, low-pressure sensation.

This is not permanent or irreversible. With the right hormonal support, either systemic HRT or localised oestrogen applied topically, much of this tissue health can be restored or maintained. If you are experiencing these symptoms, bring them up with your doctor and ask specifically about hormonal options. Describe the changes you have noticed in detail, and if possible, keep notes beforehand so you can show patterns over time. You might say, "I've noticed persistent changes in how things feel, especially in regard to sensitivity and tissue comfort. Could these be related to low estrogen, and can we discuss options like local or systemic HRT?" If your doctor is not familiar with these treatments, ask to be referred to a menopause or women's health specialist.

You have the right to ask for the support and answers you need.

But it requires knowing it's happening, which means someone has to tell you. Nobody told me. I figured it out through research, through going deeper than the standard information, through the kind of obsessive reading that I've come to think of as a necessary tax on being a woman navigating this system. I'm telling you now so you don't have to find it the same way.

The Emotional Symptoms of Perimenopause Nobody Validates

Beyond the physical, perimenopause carries an emotional weight that is rarely acknowledged in clinical settings. A grief that doesn't have a name. A sense of identity shifting underneath you without your permission. A feeling of loss for a version of yourself that felt easier and more familiar. A disconnection from your own desire, your own body, your own sense of aliveness, that is deeply disorienting when you don't understand what's happening.

These are not signs of depression, though they can tip into depression if left unsupported. They are signs of a significant hormonal shift that affects brain chemistry and mood regulation, among many other things.

They deserve more than "it's just your hormones," dismissed by many healthcare practitioners who don't have the knowledge or sometimes the willingness to help.

They deserve understanding, not distance.

Why Perimenopause Goes Undiagnosed for So Long

There are a few reasons women spend years not knowing perimenopause is what they're experiencing.

The first is the age assumption. Both women and their doctors underestimate how early it can begin. If you are under 45 and you go to your GP with anxiety, sleep disruption, mood changes, and low desire, perimenopause may not be the first thing on the differential list. It should be.

The second is that the symptoms are so varied and so seemingly unrelated that they don't obviously cluster together. Anxiety, joint pain, brain fog, and bloating don't look like the same condition from the outside. They do from the inside, once you know what connects them.

The third is that standard blood tests are unreliable for diagnosing perimenopause. Hormone levels fluctuate so significantly during this transition that a single FSH or estrogen test can come back normal even when perimenopause is well underway. A normal blood test is not a reason to dismiss your symptoms.

Your symptoms are the diagnosis.

What I want you to do with this

If you have been reading this post and recognising yourself in it, here's where I'd start. Begin tracking your symptoms, just noting what you notice each day, even small changes in mood, sleep, energy, physical sensations. Over a few weeks, patterns will start to show. Share what you're noticing with someone you trust, a friend, a family member, or someone in an online community, because you're not alone in this. Before your next doctor's appointment, jot down some notes or questions, bring your symptom journal, and ask directly whether perimenopause could be the explanation. And if you feel dismissed or your symptoms aren't taken seriously, ask to see a specialist in women's health or menopause.

Taking any of these steps can help you move from confusion to clarity. Stop explaining your symptoms away one at a time and start looking at the pattern. The anxiety, the sleep disruption, the rage, the brain fog and the low desire are not five separate, unrelated problems. There may be a single transition that appears in five different ways.

You deserve a doctor who knows this. You deserve a conversation that takes your symptoms seriously as a cluster rather than addressing each one in isolation. You deserve to know what is happening in your body before it has been going on for five years.

I spent five years not knowing. I don't want that for you.

The information exists. The support exists. The conversation is worth having now, not when things get worse, not when you finally feel bad enough to justify asking for help.

You already justify it.

You always did.

Questions I get asked constantly

Most of what people ask me about perimenopause circles back to the same handful of things, so let me answer them plainly, the way I wish someone had answered them for me.

The first signs are rarely about your period. For most women, it starts with sleep that breaks for no clear reason, anxiety that turns up without warning, a mood that feels unfamiliar, or brain fog that catches you off guard. Hot flushes and irregular cycles tend to show up later. If you're in your late 30s or early 40s and something feels quietly off even though your cycle still looks normal, that can be perimenopause starting.

It also starts earlier than almost anyone expects, including doctors. The average age of menopause in Australia is 51, which puts perimenopause, the transition before it, in the early to mid-40s for most women, and the late 30s for some. I started having symptoms at 39 and didn't know what they were for two years.

Age is one of the least reliable indicators.

Symptoms are a far better guide.

There's no single test that confirms it, either. Hormone blood tests can come back normal even when perimenopause is well underway, because levels change so much during this transition. What tends to be more reliable is a cluster of symptoms without another clear explanation: disrupted sleep, mood changes, anxiety, brain fog, a shifting cycle, lower desire, joint pain, digestive changes. When several of these show up together, it's worth raising with a doctor who actually understands perimenopause.

How long it lasts varies enormously. The average sits somewhere between four and eight years, though it's rarely a straight line. Some months feel steady. Others feel like you're going backwards. That unevenness is normal, not a sign that something's wrong.

Anxiety and depression are two of the most commonly missed connections, and I mean that literally, missed by doctors, missed by the women experiencing them. Estrogen affects how the brain regulates stress and mood, and as it fluctuates, anxiety can spike in ways that feel entirely psychological while being rooted in biology. Plenty of women are prescribed antidepressants before anyone thinks to check whether hormones are involved.

I almost was.

And yes, it affects desire, for most women quite a lot. As estrogen and testosterone shift, desire tends to become less spontaneous, sensation can change, and dryness can make intimacy uncomfortable rather than something you want to reach for. None of that means something is permanently wrong. It means your body's needs have changed, and realising that is usually the first step back toward pleasure, even when it looks different from before.