Burntmarshmallow certainly has directed you to two of the forums that you should check out, but there are some other possibilities that come to mind, given what you've said about migraines.

The first, of course, is atypical headache/migraine. We have a headache forum here:

http://neurotalk.psychcentral.com/forum32.html

Another, given that many now consider migraine to be a form of seizure disorder, is some form of seizure (which doesn't always mean the stereotypic behaviorally-disruptive kind):

http://neurotalk.psychcentral.com/forum11.html

And, given what you wrote about diet, I wonder if any medical professional would think to check your B12 levels. You can find out a lot about possible deficiency in our Vitamin, Nutrients, Herbs and Supplements forum:

http://neurotalk.psychcentral.com/forum49.html