Is it passing wind or burping? Or both?
From my experience elimination diet helped my baby enormously. But she has reflux. And part of her discomfort was wind related (burping). No matter how much she was winded, there was more. Still not sure about it but think it might have been more about how her tummy was very acidic and made more wind (I think of a cauldron bubbling), or possibly overfeeding due comfort feeding. Still not sure. But Infant Gaviscon was very effective and always brought up a huge burp and she was comfortable afterwards.
There are diverse opinions on how much diet affects your breastmilk. From my experience, it does. Chocolate really affected both my babies and gave them excessive wind (farting). Do you eat alot? Or alot of dairy? I vaguely recall reading that onions, garlic might affect wind in bfed babies. But cant rem where that came from, maybe Dr. Sears? I have read alot on this, and the protein thing doesnt ring a bell at all.
Everyone is different. But you could start with both of them for a few days and see. Although as said the dairy takes ages to really disappear from your system, for me about 3 weeks. But you will notice an improvement quickly ie. a few days.
I have also noticed that when I dont get wind up from my baby after feeding, whether she is tired and has fed to sleep, or we are rushed, or maybe just whatever I have eaten... about 3 hours later she is uncomfortable with loud farts that are obviously difficult to pass.
Cant think of anything else right now.
Take care,
Lavina