I took the pill for many years and was on femodene until 49. Most of the time I had no idea of perimenopause. It was only in the last 4 years I noticed any changes:
shorter bleeds
oestrogen withdrawal headache on week off, if I did not drink water continually
itchy privates - tried thrush treatments for a while before I worked out what it was
thinning pubes
a sense of relief when I restarted my pills
Night sweats became a constant thing. Looking back, I had these from my late 30s and never realised what it was. It was something that I had not got round to sorting out, and did not connect it to the pill until the last couple of years.
It wasn't too bad but I was getting fed up of taking them, and the headaches were getting difficult to avoid.
After I came off, I discovered libido and that I had had cyclical constipation (didn't know any different

)
However, I had random periods, vaginal and bladder problems and pains in the joints but the night sweats went!!!!!
I went onto vaginal oestrogen and then full hrt. Some problems go, and others appear. But I feel stable for now.