I had something similar happen to me, I stuttered in a group presentation and my best friend who knows about my stuttering lost her sh*t. She yelled at me and shoved me in class in front of everyone (we were in college) and stormed out of the room. Some of the other girls who don’t know about my stutter thought I was nervous and they were more understanding. Still some of them were pissed. Anyways long story short I’m not friends with most of those people anymore because they showed me their true colors and I’m better off without them. Also I met other people who are more understanding and it’s a great feeling to have supportive friends like that. You’ll find your people one day 💕