Proper healing will take 3 months to a year, depending on the extend of damage. This will include the use of a brace, seeing a chiropractor regularly, and taking some medications / adjusting your diet. If it is a torn ligament, you will have to take it easy... All because it "seems" like it's fine again, doesn't mean it's ok to start playing ball again. Since you've injured both your ankles and knee in the past few years, I can say that you're going to really need to strengthen your legs with some light weight exercises and cardio exercises that will not put much pressure on your legs. (i.E. No sprints, no treadmill, no eleptical). It will make a huge difference in your game too.
See a doctor so you can get the healing process started asap. The longer you wait, the more damage can be done, and the longer you'll be out of the game for. So don't wait around for this... If you're serious about playing, make sure you get the full treatment. See a specialist.
And when you're all better i'll challenge you to a game of 1-on-1... :p
hope this helps,
justin