sneakstooth

I've been dating this girl for a few months now and she is amazing, but when I first started dating her she was having really bad headaches everyday, she went in for an eeg and the doctor put her on some antihistamine medication, I'm not sure the purpose for that, she doesn't take it regularly because it really messes her up, her headaches have gotten less frequent, but every time she gets stressed out she feels weird starts zoning out, can't concentrate, then the migrane hits. Anyone know why this happens and what can be done for it. I feel really bad when it happens because I really dont know what to do for her, and I can't do anything for the pain and it hurts me to see her in so much pain. I found a site that seems to have a lot of information, http://www.relievestress.org but still can't seem to find an awnser. Any help would be appreciated. Thank you.