Oh that's awful. I remember back when I was about 10, we were in choir and the kid in front of me just threw up...it was horrible for everyone but I just freaked out. I fainted and cried so much, and I know it's bad, but I was kind of annoyed with the kid for ages after that. Don't worry, you need to discuss the episode with your friends and family and try to joke about it. Try to make it sound funny, and eventually the fear and nastiness of it will lessen.