Knee pain

I'd suggest you buld up the muscles around the knee on that leg, by doing leg raises and other exercises. But not knowing the extent and location of your pain, I am reluctant to advise this. I think you should be seen again by a doctor. If your doctor cannot give you a referral to a physiotherapist or physical therapist (which might make it affordable, depending on your insurance), ask your doctor to evaluate your knee again to see if there is cartilege or ligament damange. Good luck!