Girls, Hi! ? My son is 3.5 months old, hasn't written a word since …

Girls, Hi! ? My son is 3.5 months old, hasn't written a word since 23:30, it's now 07:30, that's 8 hours already. He was restless before bed. Now he eats and sleeps again, but changing his diaper doesn't help. Usually I change the diaper every 3-4 hours at night. We only breastfeed since birth, we don't drink water. It's not hot inside, the humidifier is on. Thank you.