As an older gentleman, let me give you my perspective, tho of course your mileage may vary. To start: Do I have trouble accepting myself and my stutter? Every. Fucking. Day. And that's fine. I've come to terms with this demon and tricked it into something I'm proud of. I still stutter, and it can be bad sometimes, but my current state is that I have put in almost 20 years learning how to live with it and pull as many teeth out of that demon's mouth that I can. I haven't gotten them all, but that's how it goes. I am now an expert in my stutter. I know who to deflect and parry, but I no longer hide behind a shield and pray. It was hard to do and it took years, but it has been the best thing I have ever done. As for the girls you work with, pick one and let her know that it has to stop. Do it in a nice way if you can and she will let the other one(s) know. Hopefully. But stand up for yourself (and in a way, all of us, too) and be heard. You deserve to be heard. And no, I have no idea where all those above metaphors came from...