Experiencing knee and thigh pain…..

I had a groin strain from soccer earlier this year, where I wasnt able to walk, run, or even lift my leg up. But, I still contineued to play on it until my right leg completely went out on me, and I collasped during a game, but then I played on it the following weekend on a tournament. Anywho, Ill get down to the point. Before I strained my groin, I had never experienced pain in my knee or my thigh. This reoccures on my right leg. Where I strained my groin. Could my knee/thigh pain be caused by my groin strain? Also, should I tell my doctor about this?