Pain Relief For Leg, Please Suggest Me

I have been having a lot of problems/ pain with my right knee and leg. Last summer July of 2009 I was playing a soccer game and ran into another player with my big right toe. I heard a pop in my toe and figured I just banged my toe up pretty bad. So I continued to walk on my injured toe for about a month in a half and did nothing with it. The pain in the toe caused me to walk funny in order to compensate for the pain which in turn caused every other muscle in my right leg to messed up and hurt. The pain traveled up all the way to my right hip and may have even affected my back. Finally I went to go see my Chiropractor and she got a lot of my right leg back to normal. With the exception of my right knee. So my chiropractor recommended I get a second opinion from a physical therapist and an orthopedic surgeon. Which I have done and they see nothing wrong with my knee they think the source of my knee pain is in fact being caused by either my right hip, back or right foot/ankle. Even though the pain is in my knee when I am walking. Here is my problem I need a doctor who can figure out where on my body the source of the knee pain is being caused by so I can begin to treat it with my physical therapist and begin to fully recover. Only problem is there are no doctors who specialize in this. All the doctors out there are specialists in a certain part of the leg e.g. ankle, foot, knee, hip, back. What I need is for someone to help me find a doctor that can identify what part of my leg or back is causing my knee pain so I can treat it and get rid of my knee pain for good. does anyone know of where I can go to get this done? or have any suggestions as to what I can to do to get my knee back to normal.