did you ever find answers about your symptoms? I have a similar thing going on with myself. Just curious, I don't know what this is. I have a sore throat with white bumps and significant intestinal problems that came on suddenly in Nov 2007. I have had no relief, but have a history of travel in South America as well.
I later found out the working girls often flirt and make out with guys to get them to buy their services. It is a very good possibility this was the case. I very much believe this was the source, that or something else in the country. The ENT did 2 biopsies. The first, of an area that felt like a pizza cheese burn, this was viral but no other info. The second showed normal, but may not have been a good sample. The GI was a symptom of the original cause so I think the source should be a better starting point. I still have no good direction though.
This is very unlikely to be due to herpes. Herpes doesn't cause this extensive of symptoms for this long.
You should continue to follow up with the ENT doctor for a further work up. I assume they took biopsy's when they scoped you? You should also consider a GI specialist if you are having symptoms in your entire GI tract. I would assume that it starting after you made out with that gal a pure coincidence.
grace