postpartum or sleep deprivation

I don’t know if this is a sign of postpartum or sleep deprivation and It worries kinda. I have a 3 week old that for some reason decided that the best time to have his wake period is 2 am and he stay awake for hours I literally mean more 2 hours sometimes he will stay awake until 6:30 has a fresh diaper, fed,not cold not hot, doesn’t want to be swaddle and can’t decide if he wants to be held or not and he isn’t gas either sometimes my mind is telling to just sit and watch him cry or to scream shut the hell up at him both of which I know is wrong but I don’t know what to do any starting thinking my mother was right I shouldn’t have had a child or that I should just give him up