Hi ~ I know you're a teenager. Honey, I think since obviously your parents have seen this happen, they know what's going on. They obviously have seen you lose your temper.
Why not ask your Mom if you could go to therapy? It would be the best thing to do. You could get anger management thru therapy. Trying to do this on your own won't work.
So talk to your Mom about therapy, ok? You won't regret it. If she says no, talk to your school counselor. He/she can help I'm sure. Counselors are excellent sources of help as that's what they're there for! God bless and please take care. And let us know what happens, ok? Hugs, Lee