What Causes Clicking In Legs Upon Lifting Post Injury To Groin Muscle?

I play volleyball and I also have weight training. one day it would hurt to lift my leg up, I went to the doctor and she said I pulled my groin muscle. I can run, jump, etc. but I'm out for a week. it's been 5 days now and today I lifted my leg up and extended it outward and it popped. I was wondering what that could be and how long will it take to recover from this "injury"?