I am having pain in my left hip that seems to b persistent. My dr has given me several X-rays/MRIs but nothing shows up. Dr says he's not sure what it is. The pain has some similarities to that of my Rsd left foot that was diagnosed by another dr, yet it does has some other issues. I did have knee surgery because of pain that was said to be from compensating from my foot pain, but that pain came right back and now has slowly feeling worst. Any thoughts about this?