It was a few days after (or before..?) my 13th birthday. I was play wrestling with my favorite uncle and felt my stomach was acting weird. So I went to the bathroom and was shocked to say the least. I had a HEAVY flow, I knew everything that there was to know about periods, since I had a book about puberty somewhere. I ran out and luckily my sister was there and had a pad. I made her swear not to tell my uncle but seeing two girls suddenly run into the bathroom hiding something was obvious, he mentioned it and I was so embarrassed