Bad Knee

Had a problem with my knee about a year ago, I'm probably going to need a genutrain knee brace at some point. I was playing a casual game of cricket, went to catch the ball and my knee gave way. It was so painful I couldn't walk on it for a week, since that happened I've been very careful not to pop it again, luckily I haven't, though it's frustrating because it kind of hinders what I want to do.