jaundice and feeding

I'm breast feeding but having to supplement with formula some. My baby is 3 days old and had some trouble sucking and swallowing, and as a result got jaundice. His levels were low enough to go home yesterday but he's feeding is just everywhere. He's also sleeping all day when he's not eating. I'm a FTM and feeling pretty lost right now and appreciate any advice anyone may have. I just want to assure his levels don't go up again