I train in Brazilian Jiu-Jitsu (which is like wrestling) and today I twisted my knee and I cant figure out what is wrong. My left knee got twisted inward and popped really loud I was able to limp off of the mats and ice it right away it feels like a deep bruise but I'm scared to do anything athletic. I feel pain when I straighten my leg and flex it and when I walk on it but I did the tests on this site and had no pain while doing them. The pain I have is on the outside of my left knee almost on the back of my leg right by my tendons I think.