1st of all this sr. Billirunin in a 2days old baby is so high
Which need double exchange definitely which u told going on that's good
After exchange this values changed to 27 which is also so high
May need
One more time exchange transfusion and continue intensive phototherapy
Actually how much brain affect, will affect or not we can't tell now
That doctor will tell u on further examination after 2-3months.
Next Steps
Hope
And pray to god
Everything will be ok