(NSFW and quite personal) Ladies, can you remember your first period?

I remember starting my period like it was yesterday. I was 11 years old and in a history class! Do you remember the details of your first period? I can’t remember whether I felt scared or not, I had been well informed by my mum so probably wasn’t surprised. I do member that I told my best friend as soon as I realised and she made fun of me!