I also had tkr in august I had similar pain in thigh I could not even sit in car without a lot of pain…. I used tense unit I also went to mfr massage and chiropractor. Kinetic tape also helped …. It took few months but that pain is gone for me. I also was at pt until yesterday was my last day….. so a lot of exercises and stretches….I do a lot of my own massage also painful but helps in the end….I know how you feel it’s frustrating to be in this much pain for so long …I still do mfr and I use rolling pin on my thigh to keep it loose …..you are in right place I have been there like many others …..try few things hope you can find one or two that can help you ….. use heat and ice helpful