I slipped whilst in the bath and fell backwards, hitting my head at the inside edge of the tub. It hurt extremely bad after doing so, I d gotten a super bad head ache and then the next day it didn t hurt. But now, a few days later, I was rubbing gently on the back area where id injured myself and noticed that it was slightly indented. Running my fingers even LIGHTLY across the area causes severe sharp throbbing pain, even now, 30-40 mins after doing so, it still feels as if I just touched it. What s wrong with me?