I love nursing but I don't think my baby's gut does

During the week, baby gets about 2 full nursing sessions and bottles for the other feeds. During the weekend it's opposite, I nurse her much more and we do probably only 2 bottles a day. I think I'm noticing a pattern that her tummy issues (and therefore sleep) are much worse on the weekends. I feel so down because I love nursing her on the weekends but I feel like it's causing her discomfort 😭