When I was playing tennis yesterday, I started to feel a weird pain in my knee. It wasn't a huge pain, but rather a small pain / sensation. The moment I felt this pain I stopped playing and sat down. When I sat down the pain stopped until I stood up for awhile. When I left the courts, my knee wasn't hurting when I was walking
. I went home and my knee felt fine, but I still wanted to be cautious so I stepped lightly. At home, I did some squats and felt no knee pain and shadowed my service motion and still no pain. The next day, I went to the courts, hitting some backhands and forehands. After 20 minuets of hitting, the knee pain came back and I sat back down. Few seconds later the pain was gone and I got back up and started hitting again except I was walking this time and not using any footwork. No pain until I decided to hit really hard on my forehand and accidentally used my legs. Can't remember what stance I was using. Can anyone help me
or tell me if this is extremely serious.