Knee problems!!!??!!?

Well the other day after I had played basketball as I was going to sit down my left knee joint or bone or something popped out of place then back in real fast I was in pain for about 2 minutes then the pain stopped but I hear it creaking and cracking when I bent it. This is like 6th time this has happened in 4-5 about 7 weeks apart. I really want to go see a doctor about this because I will be dancing all summer but my mom thinks nothing is wrong so she won't take me. Wat do u think is wrong and what I should do??