I’m most comfortable when people just ignore my stutter. Different people have different ways and yes some will basically guess what you are going to say and ‘help’ you by answering or completing it. While some would patiently wait till you finish. I don’t blame the former, most of them are doing what in the moment feels natural. If someone is being rude you can tell. There are times when they assume the wrong thing when they complete me and in that case I say “No” and continue with my sentence. And on rare occasions I have asked a friend to just be patient and let me finish. But that friend is hyperactive and always on kind of a sugar rush with everybody around her so I understand why she does it. About you stuttering at work, people will find out. Don’t be afraid. It could even be liberating to let them find out. That way you don’t have to stay quite just because of embarrassment. Embarrass yourself now so you can be yourself later :)