Due to BF issues, I pump and supplement for my 1 week old. The first few days he was just fine with Similac Advantage. Last night he projectile vommited after a 3oz bottle this is what he typically drinks. He did it again just now. Earlier in the morning he had no issues with a 2oz feeding. Does this sound like an issue with the amount offered to him he always roots for more after 2oz or a formula issue? I have other samples here I can try gerber gentle, gerber soothe, and enfamil newborn.