I received a head injury a week ago. I required stitches and went to the hospital, all they did was put the stitches in and didn't even freeze me or do any further examinations. My head around the injury is still very swollen and painful, but now other things are arising. The back of my head is where I split open, a little beside the impact is now very tender and sore as well, and to make matters more concerning, I have what looks to be a small blood clot at the base of my head.. what do I do??