11 year old female with pressure on chest in the middle to right chest region. Slight problem breathing. Hurt more when arms were raised. Pain has subsided. It was a dull pain like someone pressing down on chest. She is not sure if she injured it when she was throwing a ball or when her friend bumped into her hard. She did a nebulizer treatment to try and open airways, if that may have been the problem. Breathing and pressure got better but returned again in about an hour. She also has a headache but she gets them quite frequently. Took tylenol and headache subsiding. Does she need to go to a hospital right away? She said chest pain is gone completely now. Should we still be worried. What do we need to do next?