I'm super worry about my daughter

Mary

hi ladies my daughter is only 4 weeks today and last night she did something that I consider weird and is worrying me too much last night she drank 4 onz at 9 pm then 4 more at 10 pm and then 2 onz at 11 pm she drank 10 onz in 3 hours and im super worry because doctors tell me is only 2 onz every 3 hours I don't know what to do. because if I don't give Her the milk she gets really fuzzy but fuzzy fuzzy and she is not pooping everyday neither.