Is WIC correct?

Yesenia
I just went to WIC to get formula for my 1 month old. The lady told me I was feeding my baby toooo much!! I'm so confused, and somewhat frustrated. He's eating 4-5 oz right now. Usually evry 3-4 hours. She said he should be eating 2.5 oz evry 2 hrs... I've tried that before and he would cry sooo much, because he was hungry, that he couldn't sleep in the day. What am I suppose to do? How are your 1 month Olds eating?