Hey :) You say you don't stutter but what you described sounds like a stutter to me. Life can suck sometimes, I know. Have you tried a speech therapist? I think the best thing for us is to expose ourselves to what we fear which is easier said than done. Practice phone calls with someone you're comfortable with and practice introducing yourself more. I have a job interview soon and I've been practicing calls nonstop. Hang in there, you're not alone ❤