while going down a very steep hill aginst my better judgment, my front brake and rear brake locked up I skidded totally sideways and I knew i was going down so I bailed and fell down the hill and the left side of my head slammed into a tree. i was wearing my helmet. now I have a headache and everytime i turn my head my ear kinda pops. anyone have experience with this? its been 3 hours with nothing is getting better.