My Runner's Knee

Not sure if I am realizing this very late, but I think I have a runner's knee. How I found out was when I was cycling uphill, back home from work!

2/3 weeks back I had some incisive pain in my right knee, while doing a run. It has been recurring ever since. Yet to find out exercises. Do let me know if you know any. I think squats / one-legged squats have always been my single strengthening regime.