[mystickphoenix]

Someone else already mentioned Autism and ADHD, possibly a combination. Those would be my first guesses. Another one is potentially migraines. They aren't always "a bad headache" as they tend to be portrayed but can run the gamut of symptoms. From nausea, to sound/light sensitivity, to temporary blindness, or actual pain.

Definitely sounds like something you'll want to investigate with a doc, assuming you have access to one. Biggest thing is if possible, shop around until you find someone who actually seems interested in what you're experiencing and doesn't dismiss your symptoms.