Baby won’t eat consistently

Leah

Please help 😩 baby is now 3 months .. she was eating consistent bottles every 2 hours but now she is eating bottles all over the place ! Sometimes 4 oz , sometimes 2 oz sometimes she goes 3 hours between bottles sometimes 30 minutes ! And now she’s not sleeping well anymore .. and I feel like it’s because she’s not earring enough during the day 😩😩 any advise?