My baby is 5 days old today and hasn't pooped since Tuesday. His pediatrician didn't seem concerned, but now he is jaundice and still hasn't pooped. He is a breastfed baby, he is just now starting to get the amount he needs, with supplementing and pumping. But still hasn't pooped. The lactation consultant didn't seem concerned too. He is a farting chunk who hasn't pooped. What can I do??