Girls can't really understand us, we're on GVB for four months! We're …

Girls can't really understand us, we're on GVB for four months! We're doing well, there's no pain in my belly, it's soft, the baby is not fussy, everything's fine with him! Only, we don't poop for 5-6 days, maybe not at all! I give her water every day often. We had a stool test today (I'm afraid he might get used to it). Have you ever experienced this problem? I'm starting to worry about it after two months.