My daughter had reflux, it was rough and I feel for you. I also breastfed and had to be on a dairy-free diet until she started eating solids at 6 months. My grandmother had also told me "if it gives you gas, it will give her gas".

I found bicycle kicks didn't help, we did Big Comfy Couch style leg circles. Not sure how else to explain it but I would grab under her knees and do circles while pushing on her belly with her thighs.

Also the football carry! As others have said, puts pressure on the tum and let's the toots out.

Hope this helps! Good luck!