As I said to you my migraines morphed, my story started with a migraine coming on the day of my period. Then it could fall anything between -2 +3 days of my period. Then one would develop and then rebound this could maybe last for three days then rebound for three days. This extension continued until I was in bed for any thing up to 13 days with each migraine, but the beginning always starting -2 +3 days of my period. Now given that my cycles were greatly reduced by that point I could find I only had a few days left before the next period and migraine onslaught started. Nightmare! Loads was tried to manage it, nothing worked!
Then they tried HRT and I was being treated by a number of different specialists all with their specific hats on. The day after the first dose all hell let loose and for the best part of a year, with dosage changes and very very careful monitoring, I had no more than 3 migraine free days a month, out of bed.
Hormone supplementation is an absolute curse for me, no matter what is tried. Even with Vagifem I have side effects though some good and some bad, nothing I can't live with. I am super sensitive to hormone change and supplementation.
However, I think it would be different with you because you've successfully used it for all of these years and it has suppressed all of the horrible PMT rubbish that you are experiencing now. Now I think your problem may be being caused because you don't have the migraine under control i.e. you're not managing to abort them thus they are rebounding, which makes it seem that they are continuous, Do you understand my logic here? Try the Frovatriptan and Diclofenac suppositories (not tabs) and take them right at the start of the headache, it may abort it and prevent the rebound from happening.
Migraine can last supposedly up to 3 days but mine could go on for 5, which is a worry because they are concerned about Status Migrainous. The migraines should be aborted if they last too long. Docs have been called in to me to knock me out, which can abort them.
Once you find a way to abort an attack and prevent a rebound you may find you have migraine free days and with your diary you can start to see a clearer pattern. You absolutely cannot take too many triptans as it would cause MOH, which you are aware of. But if you can abort and stop rebounds it could clear time for you. Then it's finding a pill that will suit you and hopefully stop the migs in their tracks!. I understand there are new pills suitable for women of your age but sorry I know nothing about them, maybe a new thread and question will throw up some advice here on MM.
Unfortunately when HRT was stopped it took a very long time for the constant migraine situation to change, years really. It just totally messed me up and as I was further into peri (mine has lasted an unnaturally long time) I then found that my migraines were triggered by every hormonal rise and fall, so were almost a constant feature, maybe 24 days a month. Now I'm not telling you this to frighten you, it is highly unlikely that you will be the same as me, especially given that you have thrived on the pills. I honestly think they can get you sorted!!
You'll get there, roll up your sleeves! Please do ask if there is anything else. x