My baby is 16 weeks. The first 8 weeks he was on cow & gate formula and was doing great & then randomly started spewing the whole bottle so the health visitor recommended a anti reflux milk, the anti reflux milk made a HUGE difference and he didn't spew at all, recently he's starting to spew again, he takes 9oz and he spews about 2oz of it. Not vomiting but spewing. Is this normal? Or is it something to see the GP about?