I agree. At a week old it's doubtful she will sleep through the night and will wake up every few hours to eat. Even babies that are a few months old still do this. Unfortunately it's just something you'll have to work through for now and is just another joy of parenting. As she gets older you will be able to keep her awake for longer stretches and this might help for her to sleep better at night.
Well she's only a week so she shouldn't be sleeping through the day or night. But to help get her on schedule wake her up during the day and keep her awake. That way she'll be tired at night and sleep through longer stretches.