Hi! I've been working in sales for around 5 years (car sales to be exact) and customer facing jobs for even longer. I've done pretty well, got a couple of promotions, and had a stutter the whole time! Mine can get pretty bad at times but is very similar to yours, mainly blocks. Sometimes have repetitions but this is rare because I don't allow myself too. These concerns you are having are all perfectly valid but one thing I can promise is putting yourself in a situation where you have to talk to hundreds of people per week will do wonders for your mental health. It's almost a form of desensitisation therapy without even noticing. My stutter has never went away but my colleagues all know about it despite me hiding it for the longest time. Having a stutter makes you quite memorable to people, which is a GREAT quality to have in sales. People buy from people at the end of the day. I also find it quite disarming for people sometimes, in a good way, as it shows a vulnerable side to you which makes people feel a lot more connected to you quickly. I have a lot to talk about with this so if you'd like to chat drop me a DM. I'm 28m from the UK, got a wife and son and like to think I've done quite a good job of turning my biggest weakness into one of my greatest strengths! Would love to help if you have any concerns or worries.