i've had chronic migraines for a few years now. Recently i've had this really bad migraine for over a month. Received a shot from my doctor, didn't help. Then was prescribed imitrex, didn't work. My doctor now is prescribing me nortriptyline but i am nervous to take it because bipolarness runs in my moms side of the family and I don't want it to trigger anything. Has anyone reported any side effects like this from this medication?