It's hard to find good info via google, because there are so many bad info sites out there. I stick to sources I trust (Medscape, university med schools, hospitals, sometimes WebMD, the national library of medicine (which has a really nice patient-oriented site now)).

I used to have much more typical migraines (with classic auras, like scintillating scotomas and facial tingling), but I didn't get any for a couple years, then I got like one or two in two years. Now this. Relpax worked fine for me then, no idea if it would help with this. (And my tablets went out of date 2 years ago anyway.) I had Imitrex IM once, and I got a nasty rebound headache.