First days are always the worst. Truly get you man!!. There was once a time when I couldn't get my name out and the teacher just asked me to sit down in class. After that year I normally started bunking the first day or I would run off to the washroom. But I would always regret it as I didn't even try to face my fear. This year I just faced it and I didn't care if the whole class laughed or not .. I was gonna make an effort..so while saying my name I stuttered but it came out and I could convey it. It's fine . These small achievements drive me to be positive that one day I can get rid of my impediment.