question: Hi, This past sunday I was running near a pool, slipped and hit my head. However, the hit did not leave a bump and I did not have any signs of a concussion. Also later in the night, my friend and I were play wrestling and I think he strained my neck a little. One day later, I started to experience pressure in the back of the head and a slight feeling of being spaced out. Everything else, however, is fine. What do you recommend I do / how long do you think these symptoms will last. Thanks