Will I get a cast?!

Will I get a cast?

I sprained my knee kind of bad a few months ago.It popped and I could barely move it. I could hear and feel it pop and I could barely move it after. I also couldn't straiten it out completley without severe pain, I also couldn't move it to the side without severe pain. I didn't go to the doctor but I probably should have because thats what my health textbook said. I'm also 14 years old and the entire day at school I was walking on my tiptoes and limping around. I probably should have used crutches but I didn't. The thing is, now occasionally I will be moving my knee and It will pop, than it will go back but I will limp after that because of the pain than it will stop hurting. I had sprained my wrist and I was trying to be careful when I got on the bleachers and I turned and my knee popped and it hurt extremely bad

3 weeks ago
It hurt so bad that I almost cried and I couldn't talk for a minute because I was in so much pain. Should I be going to the doctor and will they have me stay off of it so that it will heal correctly, like will I be on crutches and have a brace, long or short leg cast, or will they do nothing. I think that the reason it is popping is because it never really healed correctly. I hurt it because when I was getting into my bed I twisted suddenly and my knee just popped

You really should go to the doctor for that before any damage gets worse. You may have torn a cartilage. It needs to be x-rayed to see if there is any damage in the joint. At minimum, All that may be needed is an ace bandage wrap, but if there is a torn cartilage, it may need surgery to repair it. You need to get into the doctor's office before you do any further and possibly irreparable damage to the joints.