My son is EBF and he usually goes about 4 or 5 days without pooping. But breastfed babies can go up to 10 days because they are using absolutely everything you give them in milk so if you arent supplementing alot of formula Prob ably normal especially if she isnt in a pain. Gas could be from something you ate or even air that passed from the stomach that she didnt burp out.

Going a few days without pooping is totally normal for a breastfed baby. I would continue to feed as normal unless she begins to act like she in any discomfort. Our pedi told us that they could sometimes go up to a week or a few days past and still all be totally normal.

Sounds a little constipated. You can give gripe water.