Sorry to hear this. Itll be ok, the stutter is going to happen, we have to control how we react to when it does and to what people do. If you have to keep doing these presentations.. I think I would lead with letting everyone know you stutter and if the blocks or stampers happen, try to ride it out or take frequent pauses, gather yourself and proceed. Obviously, this is easier said then done, but I believe you in. You can't let them see you sweat or get overly emotional. Youll do better next time and the time after that 😊💪🏾👏🏾