Any tips on getting a newborn back to sleep at night?

She’s super fussy but usually only at night.. it’s extremely hard to calm her down... i was told not to change her diaper at night unless there’s poop... do you wait until the morning hours to change your little one? Do you have a routine that works good for you? Please tell me this is only temporary 😭 i get so sad seeing her so upset.. she has really bad gas