Depends on how bad of a day it is for me. Often if I'm having a bad or mediocre day with it I'll say something like "I have a stuttering issue by the way so if you ever have an issue understanding something I dont mind repeating it." Or something to that effect, I've never had someone directly reject me from anything for stuttering. I dont usually make sure they understand I'm not nervous unless it's like meeting new people or dating. And even then it's often to break the ice or something. I find people care way less about my stuttering then I do