so I went to Jonah's pedication today and he's gaining weight and healthy had to switch his formula but yet he's just…

so I went to Jonah's pedication today and he's gaining weight and healthy had to switch his formula but yet he's just been so fussy that I would have to cradle him even after he eats. he's 1 week old could that be a sign he's growing? also he sleeps so good during the day and at night he's just so fussy and people I don't Do a sleeping schedule why? he's a newborn and that's hard don't you think? sorry I'm a ftm.