sorry I missed this post earlier. the injury you described could easily cause several things to happen. the hip joint, the illium or SI joint, the knee and the ankle could all subluxate or misalign enough to cause the pain you describe. It is likely that one or more did. a muscle pull, tear or strain would have healed by now so we know there is more to it than that. I would recomend a visit to a good chiropractor. the ones with the sports medicine specialty will be good with extremities. I will see if I can find someone to refer you to.