Hit my head

I hit my head this afternoon in our car, it hurt really bad. There is a little compartment on the roof and when you hit a bump the door comes open (need some duct tape). I didn't realize it was opne and as I got in the car and adjusted into my seat I hit my head. Then a few minutes later I put my fingers on my head and my hair is wet and my fingers have blood on them. It wasn't too much, but enough to notice. I drove to the Dr's office and had a nurse look at it, she said a little chunk had been removed but no stitches needed. My head still hurts. I hate it when that happens.