EleanorB, I'm afraid my post may raise more questions than answers.
Firstly, do you know what your migraine trigger is? Is it progesterone, oestrogen spikes, low oestrogen, generic hormone instability? Did you suffer with progesterone intolerance/PMS pre menopause and did you suffer with hormonal migraine pre menopause? Do you have migraine with or without aura? The type of HRT regime you eventually settle on would depend on answers to those questions. Do you mind having periods?
I had no history of PMS or progesterone intolerance until I hit the menopause. I had a Mirena coil for contraception without any problems until my own hormones started to drop. To begin with, I kept the Mirena and used oestrogen patches but I was not getting enough oestrogen out of them to combat the sweating. I also suffered with silent migraines (migraine aura without headache) so I had the coil removed and went onto Angeliq initially (not strong enough) then cyclical Oestrogel (latterly Lenzetto) Utrogestan and testosterone but I still suffered with silent migraines.
For years I wrongly assumed I had suddenly developed progesterone intolerance at menopause and so I limited the Utrogestan to 100mg for 7 days each cycle and it worked well enough for a number of years. However, I was still having to put up with migraines and the actual process of bleeding was making me feel ill so I considered a hysterectomy thinking it would be a silver bullet.
Just over a year ago, I decided to have one last attempt at finding a solution before opting for a hysterectomy and I'm so glad I did. I consulted my migraine specialist once again and after much discussion, it was decided that my problem was hormone instability not progesterone intolerance per se. She said I needed to find an HRT regime that balanced my hormones and that I must stop bleeding. I was then confronted with the problem of finding a form of progesterone that didn't give me nasty side effects and did not unbalance my oestrogen.
After a long search, I found a private clinic that offered bespoke progesterone so with a heavy heart, I made an appointment following recommendations. I went with a pile of notes and blood test results thinking it would take hours for the doctor to understand my problem but she 'got it' immediately. I was shocked! She immediately identified my problem and agreed with my migraine specialist (I took the consultation notes with me) that I needed hormone stability and to stop bleeding. She then said I must take progesterone every day and I was absolutely horrified! I told her that the Mirena coil was a no-no and that I could never, ever take Utrogestan again and she said 'no problem, the type of progesterone I am going to prescribe for you will be nothing like either of them'. I didn't believe her.
At the time, I was using Lenzetto (Evamist in the US) oestrogen spray which I have to say is absolutely brilliant but both she and the migraine specialist were adamant that I should stop using it because it is not stable enough for migraine sufferers although they did say it's a great product for most people. It was a double blow.
I was prescribed 1 pump of Oestrogel (which I thought was way too low) 50mg progesterone and testosterone every day. I didn't think it had a hope in hell of working but guess what, it did and that was well over a year ago. I'm still in shock to be honest because I really thought I was progesterone intolerant but now I feel as good as I did while on the oestrogen only phase of HRT and I have the added bonus of feeling the same all the time with no periods.
The reason I started having migraines at menopause is because I no longer had the protection of my own progesterone against spiking oestrogen levels. I now know that progesterone administered at the right dose with the right delivery system complements oestrogen and actually makes it work better.
My experience may help you and others reading it but it is important to establish whether or not you are progesterone intolerant and what you migraine trigger is before settling on an HRT regime.
I hope that helps.