this is perfectly normal. i’ve been stuttering for ages now and i’ve just grown so used to it that i’m not even nervous when i do. there’s a difference between stuttering and having a stutter, you can’t really control it either way, but they happen for different reasons. people who don’t have stutters can stutter, usually when they’re nervous, and people who do have stutters don’t stutter because they’re nervous. i wrote it a bit confusingly but i hope you get the point