One of my very first memories is what I now know was a migraine. My preschool teacher noticed that I looked sick, and it ended up being a full-blown migraine that had me out of school for two days. On my mother's side, almost everyone got "bilious attacks" (migraines with the vomiting) except her, so she knew the minute I started getting them. Strangely, I've never had problems with my periods or with birth control and migraines.
I've kept the diary, and noticed that it does change from time to time. MSG isn't a trigger anymore, for example, but light, noise, and intense heat are
really bad triggers. I take Imitrix (Zomig didn't even touch it) and if my head can handle it, a cold to not quite warm shower (it's more cooling) - then off to bed with an ice pack. The noise part means it's almost impossible to go to a concert anymore.
I think that the best thing you can do (once you've found your triggers) is to refuse to let people tell you that you're crazy or making it up, and to do
whatever it takes to make your migraine go away. It's not like you can do anything useful while you have one anyhow.