Hi @bestfriend2 and welcome to Mayo Clinic Connect. You will see that I moved your post to a discussion about pain after a TKR. I did this to introduce you to @sprinrosa64 who has had a rough time after his TKR.

You may also want to read these discussions as well:
How well is pain controlled after total knee replacement?:
https://connect.mayoclinic.org/discussion/how-well-is-pain-controlled-after-total-knee-replacement/
The Rehabilitation Process for a TKR:
https://connect.mayoclinic.org/discussion/the-rehabilitation-process-for-a-tkr/
Have you consulted with the surgeon or your general practitioner?