Hi everyone! We are new here...and have a few questions. My daughter is 5 weeks old, and we have had lots of issues with breastfeeding (mastitis, thrush, latch problems) which led to her not gaining weight- was still below birth weight at 4 weeks. Because of this and my seemingly low milk supply, we have unfortunately had to supplement with formula :/ . At 3 weeks, while I was on antibiotics for the mastitis, she began having green, watery, and mucousy poops. This was BEFORE we introduced any formula. Went to a breastfeeding medicine specialist and she seemed to think that a dairy protien allergy is the cause for the diarrhea/mucous/reflux-like symptoms and due to my family history of allergies. BUT she hasn't had any mucousy poop since I finished antibiotics and we started supplementing. She is also much more satisfied after feeding (I nurse until she's done and offer a bottle when she still shows hunger cues, per Dr's recommendation) and hasn't been fussy at all, whereas before she was screaming constantly. Still pretty gassy and reflux-y, but a much happier and fatter baby.
So, my question is this: if a dairy allergy (and not the antibiotics) are the culprit, then wouldn't she be allergic to the milk in the formula? The first 3 ingredients are milk, lactose, and whey protein derivatives! Wouldn't she still be having the fussyness and mucous/diarrhea? I'm totally open to eliminating dairy from my diet, but it seems pointless if there is dairy protein in the formula...of course the goal is to EBF once we have all our issues worked out.
Sorry this is SO long! Thanks for reading, and thanks in advance for help!