Jaundice 6 week old

Hi Mummies, My little one will hit 6 week old this week but jaundice is still an issue. NUH PD suggested to supplement with formula when I just managed to establish breastfeeding and breastfeed exclusively. I'm not keen to fall back on formula since it took a while for me to get on the momentum of breastfeeding and to have enough supply for baby. Any suggestions on feeding schedule that we can change to help baby clear jaundice faster? I'm currently feeding him 3 hourly, need to wake him up to feed otherwise he will sleep through. We did the blood tests for liver clearance and all the numbers are fine.