I'm 19 as well. Been a stutterer since childhood, had the same experiences as you. I've been employed as a waiter, more recently as a steward on the Eurostar trains, so during those last years, I had to constantly talk to hundreds of strangers. I still stutter sometimes ! But my stutter is close to gone because I put myself in the fire. I don't give a single flying fucking fuckidy fuck about stuttering. If you don't like it. F you, im doing my best to talk. My stutter has greatly improved by just talking more and more and more