While Doing Squats A Few Years Back, I Heard A

While doing squats a few years back, I heard a loud snap, felt severe pain in my inner thigh & behind my testicles. I have been unable to truly strain or 'put out' since this incident. Right after I had some bruising & swelling. Still have problems picking up my leg, sudden movements or straining too much. Any idea what I've done by not warming up & stretching properly? Guess I'll learn to practice what I preach to my clients. Thanks