Hi, i have suffered from hemiplegic migraines for years so i really sympathise with you. I have been told by my neurologist that they tend to go in a pattern. They will be worse in the teens and 20's then 30's they should start to settle down, then they go up again during menopause and then finally go after. He also suggested if they are hormonal then maybe to consider removal of the ovaries. I'm 24 and have 2 kids and its something i'm considering now.
Hope that helps in some way
good luck and take care
kerry