Grunting in bassinet only

Hello all, my newborn is 2.5 weeks old and the last few nights he’s had a change vocally. When I lay him down for the night he has just constantly grunted, arches his back on and off, and moaned. He rarely does it while being held and sleeping, it just seems like when I lay him down it’s happening. He has regular bowel movements throughout the day, as he’s breast fed. Only little change the last couple days is a slight stuffy nose. Anyone have any insight as to what could be the issue?

I’ve looked it up and some sights say it could be due to learning how to have bowel movements but who knows. I just can’t sleep with him next to me constantly grunting and moaning ALL night. Plus, i don’t see how he’s even getting rest when he’s constantly so vocal.

TIA!