Are you burping her after feedings?

You can probably use gripe water or gas drops. I would ask baby's doctor first just to be sure .

gripe water but the kind from a whole foods store! the stuff from Walmart has a ton of unnecessary things in it. if she's only 4 days old, her little digestive system is still getting used to...well everything. the best thing for her is your milk. there are ton of natural flora that will help her develop a healthy digestive system that may even help ward off major digestive issues in the future. Just modify your diet and drink tons of water. also try burping her often during feedings.. I know that part is exhausting because it seems like you just get them to latch and it's time to burp but it may help

Does gripe water help? or a pepper mint in water?

with breastfeeding if could be what your eating certain foods can make baby gassy i wouldn't stop feeding I would change my diet. you can see if they can give her gripe water not sure if it's really recommend since baby is only 4 days old

try gripe water... you may need to modify your diet... I had to completely cut onions out of mine or my daughter would get an upset tummy..... try and think about what you have eaten, especially anything new, and cut it out