Im a 15 year old girl and in a wheelchair. Out of no where in late February of 2010 I started experiencing headaches in the back of my head. I ignored them at first but I realized they kept coming back for a couple weeks straight, and they would last for about 30 minutes to 3 hours. By April it was a roller coaster headache. It would go to a 2 and then a few minutes later it would be a 10. I dont feel nauseated, well once i did, but it keeps me from doing a lot of things. I even have to go to the office at my school and wait for the headache to go back down, which takes awhile. The headaches first felt like i had a weight on my head, and then it felt like there was a weight jumping in my skull, and now it feels like theres a drill drilling itself from the inside out. I feel these headaches constantly. Ive had several tests done and Im having an MRI later today. If you have any ideas please reply as soon as possible, Im extremely worried its something major.