If she's gaining weight, and having plenty of wet nappies over the day, I wouldn't be worried just yet. being born can be pretty exhausting work for babies, so I'd expect her to be pretty sleepy for the first couple of weeks.

ABA are a good group to speak to, they might be able to put your mind at rest about what's "normal" and what's not, their helpline is 1800 mum-2-mum