Hi, last night before I fell asleep, I needed to go to the bathroom. I think I may have got out of bed too fast because after about 5 steps, I passed out and banged my head on the toilet seat. There was a big bruise on my forehead , but I felt ok and after a while I went to sleep, feeling fine. This morning I felt fine too, but now I feel kind of dizzy. What I would like to know is if I should see a doctor about this, and what they will do if I see one, take blood etc?