Help from stutterers

Help from stutterers whenever I talk to people especially new people or cashiers/ restaurant staff and even worse with larger groups of new people even if I’m with someone I’m comfortable with I stutter like I can’t even get a sentence out the way I wanna say it and I just wanna give up on what I wanted to say because I stumble so much but the problem is this has never happened before I didn’t have a stutter when I was little and I found something called “Psychogenic stuttering” can someone help me sort this out?