Yesterday while I was riding my bike I went over a bump and hit my head on the road. There were no post traumatic symptoms. I got up. Brushed myself off and walked on down to the nearest clinic where I had my head bandaged since the cut wasn.t that deep. Everything was fine until i tried to sleep and I started to have bed spins. I tried to stay on the bed spin position it goes away after a while but it feels quite bad. Is that normal? I even had myself checked by the doctors, No concussions, no severe bleeding, no dizzyness on spot. I could even ride my bike to the nearest hospital in ease. Now my neck hurts bad, but I dont mind that, figured it was just a sprain since the pain is not central and not in all positions. However I am worried about the bed spins, do they go away with time? Thanks!

Summarized question: What causes positional vertigo after an accident?