C.O.
I am wondering if your daughter really has acid reflux. I bet she has some type of food sensitivity.
You need to change your diet and track it. Do you drink a lot of coffee or soda? What about eating broccoli and cauliflower? Those are YUMMY - but cause gas in breast feeding babies. it's not just about acidic foods....like I said broccoli and cauliflower are VERY gassy foods!! Other foods to avoid?
chocolate - I know right? I got Dark Chocolate and it appeared to help...
spices - cinnamon, garlic, curry, chili pepper
citrus fruits and their juices, like oranges, lemons, limes, and grapefruit; strawberries; kiwifruit; pineapple
gassy veggies - onion, cabbage, garlic, cauliflower, broccoli, cucumbers, and peppers
fruits with a laxative effect, such as cherries and prunes.
Find a lactation consultant. They will help you out as well. It could several things other than your diet...
* your milk is coming out too fast for her - and yes - each breast can "let down" differently.
* There is a big difference between the milk that comes out first (fore milk) and the milk that comes out last (hind milk). Fore milk has the vitamins, etc. the hind milk has the fat. And they taste different.
The arching of the back? Try burping. If she is showing signs of NOT wanting to nurse? Okay - put her on the floor and take her legs in your hands and move them like she's riding a bicycle. it will help with any gas she might have.
Hope this helps!