Yep, right there with you. But instead it was during a math class and i was randomly chosen to read out math answers. It was the most soul-killing 10 mins of my life. I wanted to off myself there and then. You don't really deal with it. And everyone forgets about that except you. Its using an experience like this to better yourself. I did and got better momentarily but because i'm a lazy piece of shit, i fell off. Its okay to feel angry but that "stabbing" does nothing to get rid of the stutter. It can be overcome. Use that event to make you stronger.