New dad, got a 2 1/2 month old. It has all been plain sailing so far, we have none of this "new parent zombie" thing going on. He's slept through the night since he arrived, and on the off chance he does wake, the missus feeds him for 5 minutes and he's back asleep for 6 hours. I think we have been very lucky, especially for me it's basically been no change to the sleep routine
However in the days he does completely at random start properly screaming, like top of his voice, mouth trembling.. He'll be what seems like in a deep sleep, then go from 0-100 without hesitation. Sometimes he's just hungry or needs changing, but other times he won't stop until he falls asleep again. I guess it's normal, but it's pretty alarming