Acid reflux / constipation

Claudia • Miami cowgirl

Hi guys so my 1 month old has been struggling to poop , he will push and his tummy will make noise and he’ll start crying , he is still eating normal but hasnt pooped since 1 am last night it is 7:27 pm . What can i do to help him he seems so irritable . Is there a certain feeding position i can do to help with the reflux ?