A few days ago I became a father for a second time. Its a boy this time and...
Congratulations man! It may seem hard to
enjoy the lack of sleep phase, but do try to relish the small things. It goes by so quickly.
From my own experience: the lack of sleep won't stop. Maybe when they move out of the house, so brace yourself! But most of all: congratulations!
At some point they keep you up because they aren't moving out to the house!

My four "babies" range from 18 to 25 years old. The youngest has never moved out, the oldest came back last march, and another will be back when she graduates in May.