My right knee falls asleep when im off of it for about 30 minutes and when I stand up I have to out light pressure on it before I can fully walk. It also hurts to fully extend and it feels like it's directly in the middle. I noticed this occurring after a soccer game in which I had a Trent slide tackle. I felt no pain at the time but the next morning my leg was extremely sore. This has gone on for about a month now.