I hide my stutter too changing words. I'm going to therapy whit the aim of be able to allow myself to stutter and I've made a lot of impruvements :) but I'm still working on it. I've studied a degree (maths) where there haven't been any group presentations or situations where we have to read outloud in class. I can't change words while reading for example so my classmates in highschool knew I stutter but none of my current classmates knew, UNTIL I SAID THEM!! While I'm writting, I'm waiting to a friend and I pretend to stutter with him today. Wish me luck :)