I got a question if anyone can help me, my baby is 4 weeks old and is breastfed via expressing and it doesn’t seem too fill her up for long she’ll have a 4/5 oz bottle and less than 2 hours later she’s hungry again, if I give her a bottle of formula will it effect her stomach I’m so scared but so desperate for sleep 😩 she was drinking formula in the hospital but since we come home it’s just been breast milk I don’t want too mess with her belly 😭