assuming you havent actually torn any ligaments or tendons then you should focus on rehab and recovery.
A cortisone (or stronger corticosteroid) injection should rapidly dissipate the swelling and fluid build up allowing for quicker healing. I would lay off that leg and maybe consider using things that are known to heal ligaments, tendons, connective tissues etc like increasing your HGH(endogenously via ghrp+cjc OR exogenously via hgh injects) and increasing your IGF-1 levels. Some anabolics like boldenone would also help in recuperation and healing though if it was my choice and I wanted minimal sides and no test shutdown etc id stick with increasing hgh and igf-1 + rehab and letting the knee heal properly.