First Period

I remember when I first got my period(when I was 9 or 10) that I thought it would only last a day. I was so excited,thinking yes I'm a women. Once a month,one day? I'm fine with that. So I took my pad off before bed I expected to be bloodless the next day. Nah I just woke up with bloody sheets,and thinking wtf? Why can't I be a dude.