Ok so basically I was playing hockey at the rink and I wound up for a very powerful shot and let it go, but right after, the back left of my head started throbbing. This was on Saturday, it is now Thursday going on Friday. I am scared to go to the doctor but I don't think its anything serious. It throbs whenever I get blood flowing (i.e. when I get up, when I walk around, etc.) and has a sharp pain when I move my head in certain ways. Could this be a muscle strain, or is it something more serious like AV fistula? I am 15 and male by the way.
Forgot to mention that no medication has worked so far, and I've been using the "magic-bag" that you microwave. I've tried ibuprofen, naproxen, acetaminophen, codeine, acetaminophen + codeine, nothing has worked so far.