My understanding is that this happens to some people post fundo. Just because it feels like heartburn, doesn't necessarily mean that it is (it might be some sort of irritation of the esophagus). Whatever you do, don't expect the worst at this point.
It isn't at all unusual for members of the "Wrapped" Club to take weeks and weeks to recover. Be kind to your GI system, and all will be well. When in doubt, call your physician.