Hey, first of all: you are awesome, you are young, and you will get lots of jobs. Second: breathe, and try again. Third: you got this. If it’s not this job, it’s the next. But I would recommend you speak to them again and just tell them a little bit about yourself and that you stutter. Don’t ever think stutter=stupid or anything like that please. Please, I beg you not do to that. Love you man, go get that fucking job, you deserve it.