About 20 years ago I broke my right knee cap and was in a cast for 7 weeks where it healed properly. About 3 months ago, I fell while dancing (don't know or remember how I landed) but 2 days later the sides of the right knee felt very sore, usually when getting up from a stationary position. I thought it might be a sprain but the pain hasn't let up. It feels like a twisted sore muscle but I'm wondering if something is torn. I don't know if this has anything to do with the broken knee cap 20 years ago. Any ideas before I go to the doctor. Thanks