My daughter was readmitted to hospital twice in her first week and second week due to high jaundice level. It was rather critical, normal level is below 100 but hers shot up beyond critical level of 300. I cried a lot during those days and feel heart pain for her when i sent her to hospital for phototherapy. Her jaundice level has dropped slowly over the days as her liver developed over time after 1 month.
Please stay strong and dont't cry so much, i know it's tough but believe me, jaundice is rather common and baby will slowly heal over time. You are not alone. You may tell nurse you prefer to direct breastfeed him or bring you EBM to hospital when you visit.