i had simular problems,,mine were caused by aspartame,,i was drinking alot of diet sodas,for a few years,,then i started getting headaches,,i stoped drinking aspartame,and the headaches got worse,,read up on it ,,google withdrawel symptoms of it,,it was a nitemare,,im not saying this is your problem,,,but i know it was for me and alot of others,,,even my neuro found nothing,,,if your on aspartame,,quit,,,the headaches will get worse but it will detox out of the system,,it took me 2 and one half months to get it all out,,if your lucky,,maybe a week or too,,,google it,,,,,bober