Hello. Yesterday On A Party An Uninvited Individual Pulled My

Hello. Yesterday on a party an uninvited individual pulled my chair from under me and upon falling I hit the back of my head on it. The edge wasn't sharp and the chair was wooden. The wound bled afterwards. I did not feel dizzy or anything else that a concussion might cause but I'm still worried. What are potential problems that could arise from this? What should I do?