I used to supplement my 6 week old girl with up to 5-8oz of formula over 24 hours. It’s because despite trying I wasn’t producing enough for her.

Since we got back from visiting my in laws, she hasn’t had any formula and cries after a gulp - only drinks breastmilk. But then she also is fussy in the evenings as I don’t have enough for her.

I’m wondering if this is a normal thing for babies to eat less on some weeks?

She’s pooping and peeing fine, I’m worried she’s going to lose weight or I’m doing something wrong.

Thanks for any advice.