Pain in knee sometimes??? parents wont take me to the doctor unless they know something is wrong?

Have you ever taken a fall in your life. It sounds like you might have torn the ligament in your knee called the meniscus. If your parents won't help you then can you talk to a friend's mom, a grandmother or an aunt. A teacher or a coach. You must have some one to talk to the can help talk to your parents. Try using some Ice on ti. Every 20 minutes per hour as tolerated. You might also search on the Internet for knee stretching exercises. They may help. Good Luck.