Hey Bobby

Well done! Sounds like things are going well.

RE: the swelling - is it firm it may be just tissue hyptertrophy - is it over the medial collateral ligament? Perhaps alot of fibrous tissue has been laid down where the ligament has been healing. If it is hard could it be a bit of callus where the bone may have got "bruised". Or perhaps a bit of heterotopic ossification. I take it isn't too large? Anyway most likely it may improve with remodelling over months. As it is asymptomatic perhaps it isn't much to worry about.