I’m so frustrated and sad my baby hasn’t pooped in 2 days going on 3 now, he’s always so fussy because he’s constipated. I breast feed him and feed him formula I wonder if doing both is messing up his stomach. The kind of formula he drinks is Similac Alimentum (closest thing to breast milk) he drinks like 1-2 oz every hour but he seems to like the breast milk more. What kind I do too stop my baby constipation and how can I get him to take the bottle more? PLEASE HELP