Fussy

My son has always been a fussy one. We finally got over it like a month or two ago which thank god. But now this past week or two he’s been fussy again. Like if I hold him he’s mad if I don’t he’s mad if I try to play toys with him he’s mad if I leave him alone he’s mad. I just don’t know why. Normally I’d say something is maybe bothering him BUT the kid sleeps ALL night. Like 8pm-7pm without waking up. If he does wake up it’s once around like 4 am. So that makes me think nothings wrong because I know if something was bothering him like teeth or something he wouldn’t be sleeping so good. He’s 30 weeks today. Is this like a leap or something cause I’m over it 😅