Injuries!

I have been nursing a knee injury for about a week now. I play in a coed volleyball league with my wife and I went down hard and at a weird angle last Sunday afternoon. I finished all of our games, but this past week hasn't been good. My right calf keeps tightening up and my knee joint feels loose. One minute it is so loose and wants to hyper extend, and the next minute it is all locked up. I am a little nervous about it actually. Last Friday I tried some squats with light weight and it was so painful. I am just going to give it some more time to see if it will heal on its own soon.