2 months back I was playing football on hard ground and my leg got stuck on the ground. After that I had a lot pain in my left knee. I went to a doc. And did x-ray, the doc. Said nothing wrong with bones or ligament. But when I wake up in the morning I am not able to straight my leg for 2-3 min. After trying to straight it for 2-3 min. It gets straight and I always have a bit pain im my leg. Its 2 month to that injury but I still have pain. Help me plss.