My lil girl was 6 pds 5 ounces, and went all the way down to 5pds 1 ounce. It scared me she was so small and tiny. 😕 But yeah she gained it all back within about two weeks plus some. Now she's my lil chub. :) Don't worry its normal.. scary tho! 😙
If he's a newborn it's normal for him to lose some weight after birth. The doctor will tell you if you need to be feeding him differently at your next appt! Congrats!