I'm doing speech therapy right now and I just learned today about something stutters do called "mind reading" where they think they know what's on other people's mind but they never do. Believe me from experience you might be way off. I'd bet the only thing they're thinking about is their delicious pizza and if they thought about your stutter for a second, they'd forget about it immediately afterwards. Keep on doing what your doing, just know that you are doing ana amazing job