Almost three months ago, I had gone to the gym after my morning run after I had used the leg press weight machine. The back of my leg (behind the knee) felt strained the next morning I went out to run and I felt an extremely sharp pain up the back of my calf muscle. After that I have not been able to run because of the pain. Walking uphill, or speedwalking is out of the question, and also results in feeling that sharp pain. At first it was extremely painful to walk. I have only been able to walk at a normal pace since. I am wondering if I tore my calf muscle? If I did, How long do you think it will take to heal? What should I do in the meantime? How should I rehabilitate my leg to be able to run again?