I had a piece of fire wood hit the back of my head pretty hard I wasn't knocked unconcious so I didnt think anything of it. 3 days later it seems like my head hurts more than when it first happens I have had a headache for 2 days. It hurts to put my hair in a pony tail or bun for work. I was playing a chinese checkers game online and my friend made the screen shake that you can do on the computer to get my attention and it hurt my eyes. I looked up cuncussions and I dont have any vomiting or nausea symptoms but I'm starting to get worried about the huge headache I'm having and im not tired but my eyes feel very tired and they feel better when I close them. Should I be more concerned? I was thinking about going getting checked out tommorow but should I go to emergency tonight to be safe?