Elevated Bilirubin at 8 weeks

I went to a doctors appointment today for my son (8weeks on lSunday) originally for acid reflex but I also asked the doctor to look at his eyes because the yellow hasn’t gone away and sometimes I’ll notice a yellow tone to my sons skin. We did labs that same day and his Bilirubin levels are elevated, the doctor wont call me till Monday so I’m really nervous. Not much online about how it’s dealt with so late so I’m getting very freaked out! Wondering if anyone else has experienced this? Do you know what I should be expecting for treatment?