Difficulty understanding what I am saying when speaking.

Difficulty understanding what I am saying when speaking. This doesn’t as much regard stuttering as it does speaking but, when I speak, I honestly can’t tell what I’m saying half the time and people can barely understand me. I don’t think it is a lisp as when I went to speech therapy they said I sounded fine other than my /s/, but that has since been corrected. Is there anywhere I can go to work on this.