ok because I see poop but it's not coming out like his butthole is open like he's getting ready to but its stuck. he's not fussy but I will indeed try this thanks @kreeblim
Babies with breastmilk can go over 7 days without popping, formula fed ones up to 3 days their little bodies are consuming all the nutrients. It's probably gas. You can do a belly massage: rub stomach 15 times counter clock wise then push knees to chest, use simiticone gas drops, and it all else fails check his temp with Vaseline his bottom it can cause a bowel movement in about 10 mins.