Hurdity I agree 100%. I think hormonal chaos begins LONG before what mainstream medical would call 'perimenopause' when cycles start to lengthen and skip. There is no such thing as a 'normal' perimenopause but I think there's a classic sequence. There is a website in canada (cemcor) run by an endocrinologist who explains it quite well but I strongly disagree with her that super doses of progesterone are the answer to everything.
Stage 1
Essentially I think very early fluctuations cause increasing spikes and troughs of estrogen. You're not estrogen deficient per se but your highs are higher and lows are lower. For me this caused cyclically painful breasts, worsening pms, irritability and occasional very mildly irregular cycles. I think this is the true beginning of peri but the experts disagree
Stage 2
Next estrogen goes on a rampage. Your highs are extreme. Your lows are extreme. You might not ovulate on occasion. Periods start to go out of whack ( usually much heavier and closer together). This too is too much estrogen and sometimes low progestetone.
For me this was headaches, chills, nausea, weeping ( so much weeping) panic attacks, jitters, shakes, vibrations, tingling, hair loss, chills, crashing fatigue. Women at this stage feel like they're going INSANE,. I seriously thought I was going to need hospitalization. GRL I think this is where you are. Again mainstream medicine would not even qualify this as peri menopausal. But estrogen is sometimes way high, sometimes low. So it would depend on what day and what month they checked your estrogen.
Stage3
Next is when estrogen actually starts declining. The crazy gets better. Periods get lighter. You might skip one or two. This is probably the best time to start hrt. I'm here now and let me tell you the last few months have been a virtual DREAM compared to the previous two years. Getting hot flashes, joint pain, insomnia, pvcs, dry everywhere. Hard to believe I consider that better but I really really do. Just skipped first period. This is the stage where medicine would call it 'perimenopause''. So the early stages which for many of us are the true hell are ignored and not treated.