My 3 week old son got put on nutramigen 5 days ago now for cows milk allergy 2 days ago got put on losucs mops for GERD and carobel. I haven't seen any improvement and he is always still in agony, pulling his legs up, straining alll day and night and now this morning has diarrhea. Did anyone else experience this? Does it just mean the old milk is coming out and it will improve or should I go back to doctors?