Went to baby 9 day old appointment

Sarah🇺🇸 • Pregnant with my second baby- stay at home mother to a beautiful baby girl named Annabella 💚

Went to baby 9 day old appointment today and doctor said she dropped weight when she suppose to gain weight. I’m only breast feeding her I’m a little worried now that she isn’t getting enough milk uggggh. Anyway we have to go back next week but I’m worried now.... as a FTM I know nothing about that ....