Possible Jaundice?

My sons 3 days old got to come home yesterday and have an appointment in the morning. His results came back with an 8.9 level. I thought they would keep us but they didnt tell us anything about it they just sent us home. I was worried and they just kept blowingn it off so i thought okay maybe its normal. But now my son is developing the yellow face and wont feed he feeds for about a min and goes right back to sleep. He just sleeps in a deep sleep all day. Cant wake him, tried everything & Im worried hes not eating enough.  I called and they said to wait till my appt in the morning but im just so nervous.