Yes I do feel like that sometimes, I have a relatively mild stutter and even though no one has ever made fun of me for it I still get anxious when I wanna ask a question because for me the reason I stutter is overthinking because the moment I think about all the words in the sentence I wanna say is the moment I get anxious about a certain word. When I'm very passionate about sometimes or in an argument I can talk really fast and clearly without stuttering since I'm thinking about other things. What helps me is instead or focusing on the words when I get anxious I try to put my focus elsewhere and thats on my breathing since I run out of breath when I stutter. Also when I mess up on a word I try to repeat it really slow and with concentration it does help. Does it work 100% of the time? No of course not there's still times where anxiety gets the best of me but I'm trying to speak to people more and build more confidence.