I don't know what finally helped Brandon but he is back to eating great again without screaming. His first two bottles yesterday were not great, he screamed throughout them, but then he drank the whole next bottle and then the next three after that without screaming and has continued to drink the whole bottle today without screaming. He hadn't gone to the bathroom in 3 1/2 days and finally went yesterday morning so I don't know if when he gets backed up he screams because his stomach hurts. It is also possible that the prevacid finally kicked in or I switched him back to neosure formula and he likes that better than the carnation good start formula.
Brandon slept through the night again last night. He had a bottle at 10:30 and then went to sleep and slept until 5:00 this morning.