Cindy,
TKR’s are major surgeries. I have had both knees replaced, both hips, two back operations, two hernia repairs, a rotator cuff repair, a revision of same, etc. The TKR’s take the longest and the most strenuous PT. It appears to me that when you have TKR’s your gait changes, either you limped before surgery or at least temporarily after it. I believe that is why back pain is not unusual. My last TKR is doing great. My first one, now over twenty years later still swells and my flexion is less than 90 degrees. My wife had had knee replace two years ago and the first 18 months was doing well. Then about six months ago it started popping. It sounds like the metal clickers I played with 70 years ago. We have been to 3 great surgeons, that have done over 12,000 TKR’s, I have posted on here and as of today nobody has heard of such a noise. You can hear her approaching 10-15 feet away. Be thankful that you can walk the distances you do and can do all the activities you are doing. I believe what I have heard many times that it can take a year or more for you to really know what you have. Praying God will finish your healing process and remember it is a replacement an no surgeon can give you the knee He gave you at birth. Praying for you.
Larry