C an ortho. A simple x-ray & xam by an ortho guy will give u the answer.
Pain inside of knee. Your mcl runs along the inside of your knee, preventing the knee from buckling in. If you tore it, it would hurt along the course of the ligament, your knee may also feel as if it is giving out. Seeing an orthopaedic surgeon, and possbily getting an MRI would diagnose the injury.