Written by the PureMuze team and published October 7, 2026. This article is general information, not medical advice, and is not a substitute for a consultation with a licensed clinician.
“I just don’t feel like me anymore.” If you have said that, or thought it, you are describing the most common way perimenopause announces itself, and one of the least recognised. It rarely arrives as hot flashes at 50. It arrives earlier, as a cluster of changes that look like stress, burnout or simply getting older, and it gets dismissed as exactly that.
It can start at 35, and usually does in your forties
The age range is wider than most women are told. “Women as young as 35 can actually go through menopause, and they can start experiencing perimenopause in their late thirties,” Dr. Sarah Bonza, a physician and menopause certified practitioner, said in the session. “On average it’s well into your forties.” Menopause itself, the point twelve months after the last period, averages 51. The years before it are the part nobody prepares you for.
What is actually changing
Two hormones do most of the work, and they do not decline neatly. Progesterone falls slowly and steadily. Estrogen becomes erratic: high one day, low the next, and lower on average over time. Dr. Bonza’s description of why that matters is worth keeping: there are estrogen receptors in around 200 tissues in the body, including muscle, the gut, and the transporters that move glucose into cells. Estrogen also feeds into dopamine, the motivation hormone, and serotonin, the mood hormone. When it swings, mood, energy, appetite and sleep swing with it.
Two other hormones rise as a consequence. With less estrogen the body becomes more insulin resistant, and insulin is the hormone most responsible for storing fat. And as production shifts away from estrogen and progesterone, cortisol, the stress hormone, takes up more of the room. Angela Foster, a menopause certified health coach, put the whole picture into one image: for most of adult life your hormones gave you a buffer. “Then that veil gets pulled back and suddenly it’s exposed. Everything about your lifestyle becomes apparent.”
Why it gets mistaken for something else
Because the symptoms do not look hormonal. The ones that send women to a doctor, according to Dr. Bonza, are sudden mood changes, anxiety or low mood they have never had before, palpitations, exhaustion, weight gain in new places, and friction at home they cannot explain. Most physicians are not trained to connect those to perimenopause, so the common response is an antidepressant or an anti-anxiety medication. “Some patients will see five different doctors trying to figure out what’s wrong with them,” she said.
There is also the overlap problem. Thyroid changes, autoimmunity, low iron and plain sleep debt produce many of the same symptoms, and perimenopause makes each of them more likely at the same time. Chasing one symptom at a time, with one fix at a time, is how so many women end up exhausted and no better.
Why naming it changes things
When women finally get a name for what is happening, two things change. The self-blame stops, and the right questions start. Angela’s reframe was the one the audience responded to most: this is not a willpower problem, it is a signal that the things you have been getting away with no longer come free, and that is an invitation to take yourself off the bottom of the list. Her observation about who it hits hardest is also worth hearing: women carrying an invisible load of children, aging parents and a career at its most demanding, who are told they are simply stressed.
What to do with this
- Track the pattern, not the symptom. Sleep, cycle changes, mood, energy and weight, over a few months. One system, not eight problems.
- Ask for the tests that matter. The session covered what to test and what the results can and cannot tell you; see What to test in perimenopause.
- Check iron before you blame hormones. Heavy cycles early in perimenopause drain ferritin, and low ferritin feels like perimenopause; see Heavy periods, low ferritin and the fatigue nobody tests for.
- Talk to a clinician who recognises it. Hormone therapy is one of the options a licensed clinician may discuss with you; whether it is appropriate depends on your history and is a decision made together. PureMuze’s Menopause & HRT program describes what that care involves and what it costs.
The session, and this article, are general health education, not medical advice. Neither the panelists nor PureMuze are your clinicians, and nothing here is a diagnosis or a treatment recommendation for you. If something applies to you, take it to your own clinician.
