Help w baby please

My baby is 1 month old he’s a good sleeper, he sleep from 930pm-230am an normally goes back to bed within 30 mins of being up he eats & gets diaper change then back to sleep he goes til 6-630am an he’s up til his morning nap. The last 2 nights he’s been staying up from 230am-330/4am is there anything I can do to stop that ? I’m not sure what I can do I’ve tired cuddles, back rubs/butt pats, laying w me longer, waking w him, rocking him, his pacifier, sound machine. Ik it’s only been two days but it’s really rough when u don’t know what to do to help him go back to sleep within 30-45 mins like he normally does an Ik he’s really exhausted cuz he’s yawning/ cranky. I did notice his belly is a little hard so I was thinking he’s got some gas and it’s causing a bellyache. (I do exercises w him to help relieve the gas too but any other suggestions I’ll take)