Does anyone have any ideas? My son was born at 38 weeks and had problems feeding from the start, only taking half ounce at a time but he was never a sicky baby, at 4 weeks he was up to 3 1/2 to 4 ounces a feed. The past week and half though he has started being sick with every bottle, even if we wind him after every 1/2 ounce. It isn't a little bit, he projectile vomits and it has what looks like sour milk inside it. He is also reluctant to feed after this happens even if he has only took an ounce and it can be 4 hours since he last fed.