If you really tore your MCL (that's medial collateral ligament, not the medial meniscus) and you're only out 2 weeks, then the tear isn't too bad. And I hope that's what the MRI shows, and not something more serious. I tore the medial meniscus at age 35, just getting on an airplane. I had to have arthroscopy and I was out several weeks. I wish you the best, and hope that this is minor, and you'll be kicking butt again soon. Just remember, you're supposed to be hurting your opponent, not yourself!