baby still hungry after 4oz

my son is 3 months old and is still hungry after 4 oz, he cries & screams hysterically after he finishes the bottle & nothing soothes him! i talked to my ped to see if i can up a ounce or so and she said that not until he's 6 MONTHS! i can't stand seeing my poor baby like this, should i just up an ounce??? single FTM here 😩😢