I know saying hang in there is not going to help. But , please do however stick with it. You are only a few days in. In all honesty, it reads like you have a good case of the jitters. Everyone gets that from time to time. Having anxiety about something new is totally normal. Not knowing the answer or where things are is normal too. Give yourself a few weeks, minimum. If you are still feeling overwhelmed and stressed out, then reconsider leaving place of work. Know that you have already crossed the biggest hurdle there was -- getting yourself out there and becoming employed. Now, it just takes time to learn the job and what is expected of you. If you find you are having an unusually rough day, try to be as helpful as you can. If you stutter, you stutter. It is going to weigh on you, frustrate you, and really get you upset. You are not going to be able to hide it. The hardest thing I have with my own stutter is accepting that it is going to happen no matter how hard I try to prevent it. I suspect that is something you struggle with too. I imagine your employer is already aware of your stutter. If they keep putting you out there as a public facing employee, then they don't have a problem with it. You will find that our own worst critic is ourselves. That goes for stutterers and non-stutterers alike. What you are experiencing is totally normal.