Yesterday I gave my son (7) miralax in the am and i the pm with dinner- also two doses of mineral oil. by late late afternoon he had gone one little time - it has been 4-5 days. He was home from school b/c his stomache hurt. so by 5pm I gave him a fleeet enema- only water came back out. he had miralax at dinner too and this am nothing... whats is goiing on? should I be worried and what should I do? My guess is to try the enema again this afetrnoon.poor kid is like me, when he gdoes go it isn't much. so for him to not go 4-5 days is bad.