Jodi ... your story reminded me a little of mine although i was older at just turned 13 when i got mine so one would think i would have known better although i don't remember but my Mum said she checked on me when asleep on my first night & i wasn't wearing a pad ... apparently i thought having a period was so aweful i didn't think i would 'also' have it at night time, LOL

Most girl's i went to secondary school with got their period at 13 ... that was 1979 if that's anything to go by if generation bodies are changing (??)