Welcome to the "Chronic Pain" forum!
We have several knee problem members, and maybe one of them will see this post, and give you some ideas. Sorry, but I just don't have any experience in that area.
I'm sorry that you're hurting. Are you being taking care of with pain med's? It certainly sounds like you should be getting help in that area.
Please check back with us, and do let us know what you find out, as it too, may help someone else here in the future.
Moderator Chronic Pain Forum
"Snowflakes are one of nature's most fragile things, but just look at what they can do when they stick together"