Fussy baby

My son is almost two weeks and lately he’s been super fussy at night only. He’ll be up for 3 hours just cranky and nothing will soothe him. During the day he’s fine, he barely cries. But at night no matter what I do he just not happy. What can I do for this? Also at night he will not sleep unless he’s on a boopy or I’m holding him which I know isn’t good but I don’t get why he’s like this. During the day he will sleep in his bassinet but at night he refuses. My daughter was nothing like this so I’m so confused.