pain after diag w/ osteo arth and total kneecap removal

About 10 years ago I had both kneecaps removed due to osteoarthritis, becasue orthropedic said both were completely deteriorated. Since then the years have been painful, and no relief from the pain. I have seen 2 different Orthropedics, and several MRI's, Ultrasounds, and CT's later, they cannot give me an answer why I have such horrific pain. The point of the surgery was to relieve the pain, and at first there was success, but now is worse.

I used to lead an active lifestyle with athletics, but now has become a sedentary lifestyle.

Any help or suggestions would be greatly appreciated.