Maybe you need to call your OS. I had a TKR a year and a half ago and thank God it's ok. I still have some pain but it's usually in the mornings and after I'm on my feet a lot. I've spoken to a lot of people that have had knee replacements and some of them are still havi ng lots of problems. Please call your OS and have him check you out.
gentle hugs
Angel
Have you tried a pain management clinic?