Hello Adam,

Having read your case it seems like your MCL cannot be the only structure involved in your trauma.
The MCL is firmily attached to the medial Wikipedia reference-linkmeniscus and usually this fibro-cartilagineous structure tends to get torn too if the MCL is involved (infact also the ACL tends to get affected, in a typical clinical manifestation called "the unhappy triad")

It sounds very weird they didn't Wikipedia reference-linkMRI your knee and I would suggest to have this investigation done.

Football 5 a side, even if played in a "non competitive way" it is not indicated on people recovering from such knee injuries as it is highly demanding on your knees and ankles.

Regards

Emanuele