Hey adrenalinerush,
My first thought in rereading your post is that it could have to do with your vision. My eye doc said that was what was causing my headaches after watching tv or computer too long without my glasses. So I don't know if you have been to an eye doc recently but it is worth a shot. Either way you should let you primary doc know I wouldn't be alarmed about it but just let them know and see what they have to say too. Good Luck! Keep us posted!

Jennifer