Some kids don't need a lot of sleep. None of my kids ever took long naps. When my daughter was a baby, she would sleep 1/2 hour here and 1/2 hour there, but I don't think I was ever able to put her down at a regular time every day. And now, she is 9, and she loves to be up all night.
I know, as a new mom, you read about how your baby is going to sleep twice a day, and sleep all night. Sounds good, you'll get breaks. But what if your baby doesn't need it? What are you going to do? Force her to sleep? It doesn't work. I had to learn to just watch my daughter. If her eyes started closing and she started looking sleepy, I calmed her down and managed to get her to sleep a little bit. But there were no regular times that I could count on, and she didn't even sleep through the night until she was 4 years old! This is just the nature of some of the new babies coming in right now. They don't need a lot of sleep, and we can't use "the old ways" with them. We have to deal with each one, individually, and adjust our routines to fit them, and not us. Inconvenient, I know, but so what? It is what it is, and it isn't a problem...