I was caught in leg cramp or give out in first week of February during football practice after that I used tolagin as a external one. But after 2 weeks when I can somehow walk .I noticed that when I fold my knee for sitting in bed or something like that it is a massive sharp pain in my left side of my knee and till now it has same condition ,but I can run ,jump. But a improper jump or run in unbalanced situation the sharp pain is coming back and makes it harder to even walk for a few minutes. What should I do please help me, I am 20 years old.