Constipation HELP!

Dina
My baby boy is a week & 6 days old and is CONSTIPATED!!! The first week home he did a very good job pooped everytime after a feeding & that's normal. Now he'll go day without & get angry and fussy when he has to push. I tried White Grape Juice & Vasline with a Q-Tip in the butt, nothing works. 😔