Need advice on how to approach phoning

Need advice on how to approach phoning To put it blunt, a potential publisher for my book wants to set up a time and date to call to speak further. I have not acknowledged that I have a stutter nor have I announced that I feel uncomfortable speaking over the phone. I would like to call because I don't want to miss the opportunity, but I am kind of fighting with myself at the moment. Does anyone have any advice?