I'm scared,

Ok, I'm in the house by myself and somebody just phoned and hung up. The number was just 00. What should I do? I'm freaking out >.<.
My parents are at a funeral and all my friends are busy so I'm stuck by myself and I'm scared to leave my room.

All the doors are locked so nobody can get in, all the windows are locked and double glazed but I think I can hear somebody in the garden. I'm talking on webcam to my best friend so she'd know to phone the police or something but I'm freaking out >.<

Is it just me or does this sound very horror movie-ish? What could the number have been?

xoxo