This is super common, scroll down and around you'll see many posts like yours. I'm sure there's an overly scientific explanation for it, but what I've found over the years is that if you expect yourself to stutter, you will. This leads to panicking about your stutter, which leads to stutter. This is why if you're in a rapid, fast moving conversation and need to blurt something out, it typically comes out without a stutter. Example: I always try to introduce myself upfront for two reasons. It gives me confidence, and I don't stutter when I'm upfront. If a group goes around in a circle saying our names, I go into a panic and sometimes minor stutter over my name - "My name I-is l-like Erik." Hopes this answers your question, if you ever need to talk about your stutter with a fellow stutterer PM me.