Just a comment maybe to help you with your knee problem. Perhaps you might invest in a slip over knee brace, and wear it while you are walking or doing anyother exercises. It probably wouldn't be a fix, but at least it may give you peace of mind with the extra support.
Be glad you don't have my knee problem, I actually tore the one ligament, and will get the MRI results in a couple of days. Good luck. Also, you can purchase a knee brace at a drug store, or a sporting goods store. Or maybe even a wal-mart.
I have bad knee problem..i wore cross country shoes as told and a brace and my knee kept dislocating...i hurt it in softball...but my pain was minimal the it got worse all of a sudden..i just had surgery on it 3 weeks ago but it is still dislocating. Thy sell knee braces at walmart or rite aid or cvs...it mite be best to ask ur doctor to get you one since thos would be a lot better.
Hope you feel better soon!