Baby grunting

My baby boy is now 6 days old and he will not stop pushing as if he's trying to poop or I guess you could say grunting. I was was released from the hospital Wednesday before thanksgiving and since my pediatrician hasn't been open for the "holidays" I was tired of seeing my baby boy crying and hurting so I give him mylicon for his gas and that didn't help. So what else can I do??? He doesn't sleep at night because he's grunting and pushing & I want to know what it would be or what to do until I get ahold of my pediatrician.