I just had a blood clot about 3 weeks ago. Spent 6 days in the hospital. The symptoms I had: I woke that morning with a pain behind my knee, like I'd had a charlie horse during the night. Within hours the entire leg swelled up. At that point I knew exactly what it was. Sounds like you may have torn something, disconnected it from its attachment. Only a doctor can tell for sure and an ultrasound and blood work can rule out a clot. Good luck...like we need any other problems.