Hi Dinnie,
I have been on Femoston for already 5 months. The first two months my period came at the start of the new pack, and was normal as before. The third month I got a couple of days of spotting and no period at all. The fourth month the period came in the middle of the pack. My doc said that spotting and no period at all is fine, not to worry, as he said, without HRT I would probably not be getting any bleeds at all. Since I am perimenopausal, I attribute these to the fluctuations of my own hormones. I am due to go for a check in a week or so and will inquire about these fluctuations.
In terms of headaches, I did get a strong headache during the first month right before period. These have subsided ever since. I am now waiting for my next due bleed to start and feel a bit bloated/sore boobs but manageable.
I think it is worth checking with you doc just in case.
Good luck,
Milamam