Yeah this happens to me, it's annoying as hell. These ignorant people who do this just automatically assume I'm stupid or something, until after I tell them I have a speech issue. Then they either apologize or try to make a cheery weird joke out of it because they don't understand... Or the old "think about what you're going to say before you say it". Recently like a month ago I was at the gas station getting vape refills. So I'm about to ask the clerk what I wanted, but im going through a block saying uhhh and it dragged on like 2-3 seconds longer than I planned it to, and this dude just cuts me off and goes "YOU GONNA SING??? THE FUCK IS WRONG WITH YOU?"