I played badminton the other day after a long time. It was a indoor court but it was not air conditioned and never ever i felt so tired and drained out. After coming home i have a pain in the right side of the abdomen which doesn't go away. Although the pain is reducing every day very slowly and i can still play and run for a while without much difficulty. Is this something serious to be worried about or the cramps will go away with time? The pain is most when i sleep straight if i curl myself to a side on the bed it is not that bad.