Newborm babies having jaundice is common, even my baby had it from 3rd day onwards, the doctors told me not to worry, it is something called physiological jaundice, baby will come out of it wil phototherapy, but my baby did not have a lot of yeelowness, so i was asked to keep baby in morning sun daily, with that itself, the jaundice went away slowly in two weeks time and has never come back. Now my son is three years old. Dont worry consult your pediatrician in case of concerns.