Hi, I suffer with the exact same problem and i've had it for a few years now, i went to see my local doctor he thought it was something i was eating, but i doubt it would have caused this. Surely all these people can't be eating the same food, so there must be something else linked. personally i think its stress related, only 13 but its kinda tough, been through alot recently and i haven't had these burps for over half a year, thought they had gone for good, they came back a week ago, i got stressed again yesterday and they came on again today, i think this could be the cause, not 100% certain just a thought maybe you can consider. hope this helps xxx