My son is 6 weeks old and from birth he's been breastfed and also supplemented (started supplemeting at 6 days old). I was told that my milk wasn't in so I had to give similac advanced being that my son was born 9lb 7 oz and I wasn't "producing enough" for a baby his size. But, I wanted to EBF so I did not give him the formula in the hospital- I knew I had colostrum and that he had a great latch and in a few days my milk would come in and we'd be fine. In the hospital there did not seem to be an issue with his BMs. He pooped just fine. after we brought him home from the hospital, he immediately stopped pooping and did not have a BM for 3 days, and also did not urinate much. We took him to our pediatrician and she said I needed to supplement him because he was dehydrated. I believe it was a glycerin suppository she used to get him to have a BM. We then started supplementing him and he became more regular...and was such a content and happy boy. I saw a lactation consultant who said I had plenty of milk so he became almost EBF- with just a few ounces of formula per day. As he grew I felt I needed to supplement more- he was constantly starving and I was exhausted and sore from BFing. so, needless to say i started to supplement more...and he was still content and calm. Soon after, he started having issues with gas, and discomfort- (pushing, grunting, straining, fussing) he developed a lot of redness around his anus and a rash on his face and was not pooping. Doctor then diagnosed milk allergy(at 4 weeks of age- she also tested him for microscopic blood and came back positive) and switched him to Similac Alimentum, and I cut out all dairy from my diet. improvement was almost immediate- he started pooping again and his rash lessened as well as the redness around his anus (and tested negative for microscopic blood about a week later) We are now Bfing and supplementing about 10-12 oz per day of Alimentum and it seems as though he is going right back to square one...(pushing, grunting, straining, fussing) sometimes going 24-48 hours without a BM. I am at my wits end! Not sure what to do- its very overwhelming to be this helpless with the little one. He has days of being perfectly content and then he has days/nights where i feel like he is CONSTANTLY straining to pass a BM. can anyone help?