Its still ok. Baby shed few pound some days after delivery due to passage of meconium (dark stool). Breastfeed ur baby on demand, like every 2 hours, at most 3 hours, empty one breast before putting him to the other, ensure proper position so he wont get tired of sucking before getting filled and u should assume a comfortable position so u wont get tired too. All d best.
Registered Midwife