Grunting baby?

Monique • ☀️💙11/28/2018💙💜due 11/30/2020💜👨‍👩‍👧‍👦

This past week my.boy has been grunting like full on man grunts, and not sure why...he isnt constipated..goes once a day..but he looks full on mad when he grunts and does it a lot...henwill be 6months on the 28th...any other mamas go through this?