Don't worry about it. With my kids, there sleeping schedule had more to do with the time they were born than my sleep schedule while pregnant.
Babies are wide awake and ready to eat for the first 2-3 hours after birth, then they may sleep the better part of the next 18-24 hours without eating. They have to recover from the birthing process just like mom does! My son was born around 6 PM and had a great sleep schedule from day 1, my daughter was born at 5 AM and was a mess for the first couple days, but we were able to fix her schedule withing the first week.
*Keep that in mind when your baby won't eat in the first day of his life! IF you plan to breastfeed, he won't be hungry and may not eat much until day 2 and it is FINE! Don't let the nurses convince you to give him a bottle. Just in case:)