Acid reflux?

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I am breast feeding and I'm not sure if it's something I am eating but my baby has been spitting up a lot more and sometimes it doesn't come all the way up and he swallows it and starts gagging. Also he's been pretty fussy after feedings and kicks his legs like he's in pain while screeching. I don't know if I should take him to the doctor over it because he is consolable 99% of the time (with a lot of time and patience), I just hate seeing him cry if there's something I can do to make it stop? We tried gripe water and it did not help at all and I am really not comfortable using it because of the ingredients, I would rather him take something that is %100 natural if that was an option.