Ah I can understand that. I frequented a Buddhist temple for a long time and we also had to read in front of each other. My stutter was way worst back then so it tested our patience for sure! Try to keep in mind that their reaction is actually a projection of how they feel in the moment and not a judgement they have towards you. Always remain in the spirit of love and self-compassion and your stutter will eventually slip to the back of your mind, I promise!