your supposed to feed yr baby every hour and a half if breastfeeding and no more then two hours formula feeding u can go 3to4 hours at night twice but after that u have to consistent
They're confused at first n mainly stay awake at night. My son was colicky so he was awake every night all night screaming. Don't let them go more than 3 hours with out eating.. unless you formula feed I think it's 5 hours cus they stay full longer but the more you feed during day the better and less they will wake up at night.
They are suppose to sleep most of time waking up every 2-4 hours to eat change diaper and look around.
I have a 3 week old and for the first week I had to wake him up every 3 hours to feed if not he would of slept a good while...but u should wake baby up to feed at least