Demi Lovato lost sister

Hey I'm Dolyiah (doll-yi-ah) I'm 5 years old and I lived with mommy. Yes LIVED because mom took me shopping and while I was in the dressing room, she left me :( When I got out, I asked the cashier if she saw my mommy but she said no. But one thing scared me, she said she'd call the police in case someone is looking for me but I doubt it 'cause I never met anyone beside mom. For my dad I only know that his name is Patrick. Right now the police couldn't find mom so I was put into a foster home in Sherman Oaks.