hello doctor , my baby is 6 months old and he had papaya puree at 3pm in the afternoon than had bottle feed at 5 pm and than had khichdi at 7 pm and than breast feed at 8:30 pm but around 10:30 pm he spitted out slight khichdi and after than we didnt gave him anything neither he is showing any signs of hunger but he is gagging again and again after some time like he is about to vomit what should i do now and what could be the reason for it