i can’t stop stuttering or talking fast and i’m tired of it

i can’t stop stuttering or talking fast and i’m tired of it i’m so tired. it happens everyday, with my family,with my friends,with my teachers, with my ADHD therapist ,with the cashiers at the supermarket you name it. i blur out everything, a vomit of words. nobody never understands me the first time and i have to repeat what i said at least 2-3 times. add the fact that i stutter and it’s the cherry on top of this shit cake. it’s gotten to the point where i’m seriously SERIOUSLY considering to stop talking. i want to be friends with my classmates but this keeps me for making conversation. i’m so mad at myself that i can’t speak. sometimes i cry for this. it’s been going on since i can remember. i tried following my therapist advices, i tried imagining that the people i’m talking to are foreign,aliens whatever, i tried doing breathing exercises before speaking, i tried reading aloud ,meditation but nothing works. please share some help