About 2 weeks ago when I was washing my hair I was lying down on the tub where my chest is. So basically I put some pressure onto my chest. After maybe a day the chest started to hurt. It hurts when I let all the air in my lungs out. About a week later it good much much better. On tuesday I played 1 hourt of badminton I didn't even feel the pain in my chest. But today for my badminton lesson the chest pain came back. It hurts when I do a clear/smash, when I turn to the right and left and when I exhale almost all the air in my lungs the pain is there. Right now I can't see a doctor to confirm what's wrong but I want your opinion on what I should do. For example umm heat/cold pad,get some rest etc. Thanks for your time, much appreciated!