This is called Roemheld Syndrome or Gastic cardia. There are many causes and many different ways this thing presents in each one of us who has it. For me it isn't necessarily the carbs, but sometimes certain fats. Something like any kind of greasy or oily crackers will set me off, but something like an apple or ice cream will not. So the carbs are irrelevant. It seems to be the fats that get me.
I will add, sometimes needed to burp can be a cause. I find that if I lay down on my stomach or get in my knees and lean forward sort of in a fetal position for a minute or two when I go upright again a massive burp will show itself. This can help, as can drinking a couple of glasses of very cold water. Sauerkraut seems to help as well.
But you are on the right track Each person should make a note of what they eat and what happens after and for how long. Because that is truly the only way to identify triggers and eliminate them.
