After a day of riding roller coasters at Magic Mountain with no problems, as I was riding on the old, rickety wooden one, I suddenly got the most excrutiating headache I have ever had. It was a very sharp pain that went in a line from the top right crown of my head, down to my eye. I didn't go on any more coasters after that, obviously. I chalked it up to sinus issues at the time, as I tend to have sinus trouble in situations like flying. The thing is the headache persisted until that evening, and has been off and on daily since then. Sometimes it is the same, sharp pain (although not as intense as the first day), and sometimes it is basically an "eyeache", for lack of a better term. It does not seem to be worse, but not better either. Also, my vision in my right eye seems different. I have finally gone to the doctor, but am waiting for my insurance to approve an MRI. Can this be a subdural hematoma? If so, would it sill persist, without getting worse or better, for the almost two months it has been since the roller coaster???