I was recently told. . .?

I was recently told that I had a lisp. My younger cousin has one, so basically I just learned what one was. I couldn't believe my ears!!! But 5 minutes ago, I said my abc's to a mirror, and I noticed that my tongue pressed against 2 holes I have, cuz I had two teeth taken out to make room. I haven't gotten my bottom brace yet . . . I also know I have a stutter! I don't know what caused the stutter, because, before my braces, I think I talked just fine!!! My question is: how do I tell if I actually have a lisp, and how do I cure my stutter and maybe lisp?