Gassy newborn ? Mommys little gas bubble

mrs.

My baby is almost 3 weeks nd we are exclusively breastfeeding. He is so gassy and seems so irritated when he poops. Like he straining alot nd he cries. Idk what to do. I'm pretty sure he is laching good. I try to burp him in the process of feeding as well as when he finishes. But my poor baby. 😔

Any advice as to what to do?