Good morning Dr.my 2 and half month son now a days is not taking feeder he never do this but now he is taking out feeder and vomits.we changed also milk formula but he is not taking that also. recently we were giving lactodex1 then we started lactogen, because here lactodex1 was in very few places available.now we are giving lactogen.and he is also constipated and doing green yellow poop after one or two days.but before this problem he daily poop two times.and one more thing he is some times coughing.plz tell what to do?