My son was only diagnosed after i stoped Breast feeding... After persivering (spl) with BF or 3 months and in the end not having a great milk supply i was advised to start supplimenting night feads with a bottle feed. As soon as i started bottle feeding the vomiting started (projectile) he would curl up in a ball and scream... i tryed formula after formula and no change...i finally got him booked in for the Barrium meal test at 5-6 months which showed he suffered reflux. They put him on meds before ever meal and it helped the pains heaps... he still threw up but at least he wasnt in agony constantly... I'm hoping that i can BF the next bubs longer as i was told it can occur in sibblings aswell