flyintigrus
What medications have you been taking? How freuently?
I'm glad that you know about rebound, but I'd like to share a link to some information about Medication Overuse Headache which is really what most people call "rebound". I hope it might be helpful.
Unfortunately, we can't advise you on medical advice, so you really should see your doctor. Knowing about MOH may put you a step ahead of your physician though, so I hope you get a chance to check out the link. As if having Migraine isn't bad enough, adding another headache disorder to the mix is just unbearable for some of us. My thoughts are with you <3
~Ellen