It's not an issue to use the combined pill after age 30 (or up to 45) if you have migraine without an aura and no other risk factors for stroke (non-smoker, not overweight, no high blood pressure).
Migraine without aura does not increase stroke risk in the same way migraine with an aura does. It just needs individual evaluation of overall risk factors.
The COC was suggested to me by a specialist neurologist on the NHS as a possible alternative to HRT which might help control menstral migraine if HRT made it worse. I'm 41. I was already under the neurologist for migraine before the issue of HRT came up.
It's used in lots of women between 40-50 who have endometriosis.
GPs are sometimes uncomfortable providing it without input from a neurologist, but my menopause specialist also suggested it because it provides a stable dose of estrogen and progesterone which can improve menstral migraine and give better control of menopause symptoms to women earlier in perimenopause.
It's not supposed to be used as a first line response to migraine, but if you have menopause symptoms too then it can be very effective at managing migraine and is a known pathway.
I guess maybe the answer for OP is that some specialist input is needed if the continuous utrogestan doesn't work out. Migraine is a complication for HRT, you can request to see a specialist because of the migraine.
It's absolutely not a case of either transdermal estrogen + utrogestan works or come off HRT and lump it. But you might need some specialist input to be able to access some of the alternatives. Someone who can really evaluate the real risk/benefit profile of the alternatives and feels comfortable prescribing them, instead of jumping to the stock answer.
There are different progesterones if you feel that might be the issue (it probably is behind the mood issues, it is a known side-effect)
Transdermal estrogen patches are considered to be the most stable release of estrogen to help migraine, but maybe you don't have enough of it to control the fluctuations? Or the COC absolutely is an option for some younger women with migraine without an aura and no other risk factors.
You don't just have to put up with it or give up because the easy solution doesn't fit you, but you do need the full information to make decisions.