New born jaundice. Still is it serious?

I had c section delivery with rh negative pregnancy with o negative  as blood group on 12 th Oct 2023 I have been blessed with baby boy on day 1 billrubin was taken he was not having Jaundice on day 4 hospital people taken another sample he was diagnosed with 15.9 total billrubin so they told keep him double phototherapy for 48 hours after tht again sample taken he was having 11.4 total billrubin they told to keep him in sunlight we r keeping after 3 days again in another diagnostic centre test was total billrubin was 12 above and this are having biological reference now it is 12 th day today my baby is with o positive blood group please suggest what to do iam giving vitamin d3 drops 0.5 ml and liv 52 drops also 3 drops a day still is it serious ? Do i need consult pediatrics