Okay so my son will be two weeks on Sunday; He screams bloody murder when he's hungry and I feed him about 2-3 oz and he will STILL act like he's hungry but he spits the milk up sometimes like he's full but STILL acts very unsatisfied. Sometimes I'm worried he isn't eating enough but then he spits it up so I worry he's just being greedy. I don't want to UNDER feed (I breastfeed , if that helps any) but what do I do ?????????