I really wouldn't take the three hours as gospel.....babies are all different. What is right for one won't be for another. Just do what you feel comfortable with and what you feel is right. I have heard many times that 13-15 hours is how long a baby should be asleep for in a 24 hour period. So if you look at it like that she isn't doing so badly! Good luck with it and hopefully you will get into a happy routine soon!