A childhood belief about names

When I was born, my grandmother called me Laurie and everyone in the family followed suit. It was the name I always used, at school, at church, meeting new friends and so on. So when I got to first grade, the very first day, my teacher was doing roll call and mentioned a Lauren, but that wasn't my name, so I didn't answer. She gets to the end and I haven't uttered a peep, so she walks up to me and says, "you're Lauren." which couldn't be true because I'd never been called by that name before. I stood up and shouted at the top of my lungs, "My name is Laurie!"