over feeding

So my lo is 2 weeks old and I was told he is supposed to eat 2-3oz every 2-3 hours. Well tonight he's had about 4 1/2 and still acts like he's starving (biting hands, rooting around, spits out pacifier). I'm scared I'm over feeding him but he just won't stop!! I don't want him to spit up but I'm so tired and ready for him to sleep so I can 😩 is this normal??