What's your first period story?

I was 11 and it happened during school. It felt wet down there so I thought I had pissed myself but then while I was getting changed in my swimmers I saw red and I was like OMG I had my period! And i was celebrating because I felt grown up and normal because I had been wondering for a long time if something was wrong with me and if I couldn't have children because the majority of girls in my grade at the time had already had theirs.