I landed on my left leg (Straightened) while playing football approximately 3 weeks ago. The right side of my left knee hurts, along with the back and calf muscle. Knee is yet to regain full range of motion, it hurts when doing a quadriceps muscle stretch/tightening (right side hurts) no history of injuries (on this leg). When I straighten my leg out right side feels very tight and sore. I can walk with no limp now (crutches for two days, limped for a week after), I followed the RICE principal. My knee did not swell and I still feel slight instability. There was a click as injury happened (not a pop) which makes me think it could be meniscus or possible PCL. I really want to get back to football, what do you suggest.