Can it be her forumla?

My baby is going to be 4 months tomorrow, but for the past few weeks now, shes been really fussy, screaming crying and nothing I do will make her happy, she also goes like 2-3-4 days without pooping... andI know for a fact that its probably her formula(shes on Similac with Iron ) she goes to the doctor on the 23rd, shouldI talk to him about possibly changing her formula or shouldI make an appt. sooner and get her in?

I know that in adults, iron can really constipate you. I would like based on that, that it is the extra iron in the formula... K.

Mine wasn't pooping regularly either, and then I switched her to Similac Isomil Advance. It helped! But def. talk to the doc about it too!