3 day old neonatal is brought by the mother to pediatrician, with complaints of yellowish discoloration of body. On testing bilirubin level is found to be 20mg/dL. What is the next step of management
Age 
Cut - off for phototherapy


24-48 hours
15mg/dl


48-72 hours
18mg/dl


> 72 hours
20mg/dl
Stop breast feeding
Stop breast feeding and start phototherapy
Continue breastfeeding and start phototherapy
Initiate exchange transfusion