I am a 14 year old female and had arthroscopic surgery with microfracture to repair torn articular cartilage about 8 months ago. after physical therapy and lots of rest, i was cleared to play lacrosse again. My knee was feeling alot better and stronger. i still wear a brace while i play to try to prevent any further injury. however, i'm afraid its injured again. my knee clicks and pops alot no and there is a piece of what i'm guessing is cartilage that moves around when i'm walking or running etc. my knee feels very weak and stiff like it did before surgery. i have some swelling and sharp pains when i pivot on my knee. anyways, is there another surgery i could have to fix this problem or am i going to have to live with it?