I had a very similar experience. I took on a job as a cocktail girl during my "good speech period", which was a HUGE leap of faith for me. As soon as my stutter began to show its annoying face a few weeks in I felt certain I was going to be fired ( I mean who would want to keep a worker who couldn't even say water?). With this thought in my mind, I kinda gave in and accepted my stutter; when I blocked with customers I tried to not let it affect my overall cheerier attitude. Of course, that did not stop some people from mimicking me or laughing in my face, but it also gave me a new perspective towards my speech imped.. The less I cared about my stutter, the less likely I would stutter. Fast forward two months into my job, my boss loved the fact that I was confident with the customers and how I was 'aggressive' about my work (his words, not mine) that he started training me to bartend . In all my years as a stutterer, I would never have thought I would have such a communicative job!! So like I said earlier, my word of advice is to not give a flying f*** about your stutter while your working. It'll be difficult at first but the more you put it aside, the easier it'll be for you to relax about take your time with your speech.