Re-injury of the MCL? ?

On Wednesday, January 7, I was playing badminton without my knee brace and while I petal backwards to get the birdie with the correct stance, suddenly i felt a sharp pain in my left knee. It seems to twist to the right. Then I did a 360 degree turn and fell down with my left knee bent behind my thigh. My knee was like locked overnight. I think it's due to the wound getting swollen? I couldn't lift it up or really walk on it. My parents came up on thursday (the next day) and grind ginger then put it in Vodka and put it on my knee. I felt my knee burning but I think it's just decreasing the swollen area that was on my knee. I don't know if it's a good idea to heat my knee while it's swollen. I sleep with my knee raised up. Overnight, when I twist and turn, I feel I could move that knee. It was amazing. The next day at night, when I take off the bandage, I feel I could limb walk. Now, it has been about 11 days later since I got injured, I feel fine. I thought after i got re-injured, it'll take months to recover but this morning, I tried shuffling and sorta running, it was fine. I could bend my knee too. It just feels a little sniff compared to my right. I told my friends I won't play till I fully recover but sometimes I get this feeling like I want to play or run with them when we hung out together. I was thinking of going to the health center to check it out if it's okay and have his permission to play again but then he'll pive my knee and it'll hurt more. I'm still questioned about how can a re-injury feel that fast? Does anyone ever experience this or if not have you experience a re-injury and how long it took you to heal? Sorry for my long story.