My little sister who's 12 yo was standing on top of my office rolling chair trying to get some clothes from the closet and ended up falling right on it with her legs wide open she was screaming her lungs out and crying because of the pain , as she went to the bathroom she found a little bit of blood on her panties ( she still hasn't even got her first period yet !!) she told me that she got hit directly on her vagina !! Im so lost as to if the blood coming out was due to the fact she was hurt or is it just her period starting ? My mom is currently not home to take care of her so i need to know if i should wait to makes sure it's her period or should i take her to a doc ?