I mean I’m not very anxious when I’m talking to my partner or family but I still stutter. I can’t avoid stuttering, it’s a part of me. But I also recognize that just because it’s something I’ve dealt with my whole life, it doesn’t mean I’m an expert in the physiology of a stutter and I fully understand what’s going on. If you want legitimate advice and insight, make an appointment with a speech language pathologist and they will help you understand your stutter better. Most people get intense therapy as a kid then fall off so it’s likely you don’t know as much about stuttering as you think. That’s not an affront to your intelligence, it’s just not a lot of us spent half a decade studying speech and language lol