Last night while playing basketball I got hit in the temple by an opponents elbow. It hurt a lot last night and my vision seemed a little blurry on that side of my head. I was a little nauseous after. I slept through the night and now I still have a dull headache, pain to the touch, and think my vision isn't 100% but not super impaired. Is this normal? Something to be concerned about? What should I do?