a day as someone else

hten you notice that something seems odd about the girl staring back at you through the mirror in the bathroom. you seem shorter, and younger. then it hits you, the girl in the mirror is your sister! somehow you turned into your sister. you rush back into your sister's room to see if your sisters in there but you dont see anyone. you go to your room and look around but to your surprise, your rooms not there anymore! could this mean that you never existed? your an only child now but not the way you had expected...