Last March (2011) I passed out one morning getting ready for school. I fell flat on my back and hit my head. Ever since, I cannot lay on my head without having pains, I get frequent headaches, and I blackout very easily. At least once a week, sometimes multiple times a day. Whether standing up, just walking, running, or even looking upward. This never happened before. We went to the doctor and she said that nothing was wrong. I just... don't feel right and... its going on 10 months now. What should I do?