My baby doesnt burp after every feeding(breast feed) i tried to keep him upright nd rub his back..still nothing and he vomits instantly he drank evrything after every feed if i lie him down (sometimes vomit is like all the milk he had and its spit up sometimes) im worried that if he keeps throwing up, he might not get enough nutrition and gain weight..i'd like to knw is this all normal or i should do something abt it??? Thanks.