My 2 1/2 week old has been vomiting on and off for over a week. MY Ped, thinks it is that i have an oversupply. He fights at the breast and chokes at times. Today, the milk was spraying at him. I pumped yesterday and got 4 oz from each breast, when we gave a bottle, he only at 2-2 1/2 oz. How do i limit my supply without pre-pumping. i only want to pump at night, when my DH gives him a bottle and I will now only pump until I get 2 oz and not 4.