Baby Poop ???

Good day mommies, need your friendly advise regarding with the poop of my LO. 5days na sya hindi nag poop pure breastfeed po baby ko he just turned 5mons last sunday. More wee wee lng sya walang poop hndi nman sya iyakin at sakitin. Nag la latch nman sya normally. Do I need to go for a check up now? Thank you