Hi Sandy and welcome.

Very sorry to hear about your experience. Unfortunately, many of us have had experience with clueless doctors.

Considering the problems with your knee, have you tried aquatherapy? That would help keep mobility while putting less pressure on your knee joints. I am swimming at my local YMCA on the recommendation of my MD to spend at least 6 out of 7 days in the water for a minimum of an hour/day. (That's one of my many therapies.)