I will give you my example of how difficult knee pain issues can be to resolve. After $1000 of out of pocket medical expenses for various tests and experts the conclusion is "we really can do nothing for your knee pain". The diagnosis is a damaged nerve on the outside of the leg which is presenting itself as low level constant pain in the knee area. Most likely from a plate in my ankle due to a break in 2002! The bottom line is that time to heal may be your only avenue.
I took 2 1/2 months off the bike just walked for exercise to no positive affect. Decided in Jan. to just start riding again and it has not worsened.