I don't drink sodas anymore 'cause of what they could possibly do to me. And, sometimes, I would get it for no good reason. Just like this weekend, I've been miserable with the "burn" and dry heaving. My own fault though. Too much wine to help with a banged up back.
Have you tried Tums, Maalox, etc... That normally gets me right, at least, for a few minutes. And don't count out cold water. That'll fix me up sometimes to. Get it checked to be safe though.