Both of my daughters have migraines, one of them very frequently, and always with long lasting, and extremely severe pain and nausea. Now she takes Imitrex (Imigran in Denmark), and when she catches the migraine early enough, it can erase it completely. It makes her feel ill for several minutes, but that is nothing compared to the three days of suffering she would have without Imitrex. (It has no effect if she does not take it in time.) It has been a wonderdrug, a true life saver for her.
In all likelihood you already know it and use it, but here it is just in case you don't. I have seen many of my family members suffer from migraines, it is a horrible, debilitating affliction. I wish you best of luck with finding relief.

birte