I donated a pint of blood on Wednesday. I felt fine til I went to bed. I take topamax for migranes (still fine to donate) but developed a horrible migrane. I'm a college student and I know I can't miss class. I took some excedrin as I left Thursday but it didn't help, only got worse, so bad, I got dizzy and fell down 3 stairs. My stomach has also been bothering me, but the migrane just keeps getting worse. What should I do?