I know exactly how this feels, I literally failed multiple interviews because of it. some interviews went very smoothly with barely any stutter, others went horrible to the point where the interviewer questioned whether I can speak English properly or whether I was overly nervous, which is not the case at all it feels like sh** to have to explain yourself in every single interaction you have and some people make the situation even worse by asking you more questions about the stutter and speak to you like you are a little child that needs help. it is such a confidence killer