Yesterday, I took two Excedrin Migraine in the morning, to start the day off with no migraine. Then, I took one more four hours later, because I felt a migraine coming on. I know you're only supposed to take 2 in 24 hours, but I just wanted to try to break my headache. A couple h after I took the third, I began to feel extremely dizzy, also as if i was underwater, an like I was going to pass out. Late last night, I had the most horrible rebound headache, like I was getting stabbed in the right side of my head. Today, I still don't feel so great, but I have to go to work. Has this ever happened to anyone else?