Correct diagnosis is crucial. This cannot be done in a web forum. Whether you go see a PT, Orthopod, Sports doc or other is up to you. My knees were mis diagnosed for years. I got a correct diagnosis from a podiatrist who specializes in atheletes and gait issues, look at the whole joint system. Amazingly enough my problem was fixed with a prescribed set of stretches focusing on certain leg and knee muscle groups.
Irulan
2015 Liv Intrigue 2
Pro Mongoose Titanium Singlespeed
2012 Trek Madone 4.6 Compact SRAM