Hello, I hit the back of my head on the corner of my dresser while I was sleeping two days ago, it cut my head open, but there was not much blood, I have a little bump on the back of my head, now today about an hour ago, I started getting a headache but it went away, and then I wrestled my girlfriend and my headache came back full force, mostly on the left side of my head, granted I also didn t drink a lot of water today. But I m wondering if I should go to the doctors