Help Please!

Karissa • Mommy of a 9 year old little man (6/9/13) , 4 year old little man (9/13/17) and a 5 months baby boy (6/13/22)💙💙 RIP My Angel 9/23/2020👼.

So my DS just turned 3 weeks today! This is my second child and never had this issue with my first so I’m at a loss. Anyways, the issue is, he grunts for hours around the same time every morning! Starts around 4-5 am and doesn’t stop till around 7:30-8 and doesn’t have this issue again until the next morning. I’m so confused and it seems like he is trying to poop or something. I breastfeed him and burp him every time I’m done and even during the grunting hours to see if that helps but no luck. Like I said, he is fine during the day and night before 4 am and then bam 4 hits and we lose sleep! This just started about a week ago and I am just wondering if anyone else has had or is dealing with this issue currently?