Stuttering at work

Stuttering at work Hi I always had a stutter. Sometimes it was more severe (especially in middle school) but never let it stop me from normal life. Now I work over the phone in customer service and I started stuttering so bad. Sometimes I can’t even say a word. Voice is the only way I can communicate in my job and I really don’t want to quit because it won’t solve the problem. I really don’t want to annoy these people. Most of them don’t even understand what’s wrong with me. Waiting for speech therapy at the moment but do you have and tips? Thanks