Ive just returned from a 5 day trip to Cancun. the resort staff said they filter the drinking water and the ice is usually okay to drink. I have a sensitive stomach so I tried to avoid it as much as possible, but I did eat some lettuce, vegetables, and frozen drinks. I stayed well hydrated with bottled water throughout the trip. Today is my first day back in the US and I've been experiencing very bad diarrhea (around 10 bowel movements last night and today combined). The diarrhea is accompanied by bad cramping and stomach pain. Does this sound like travelers diarrhea or is it more likely just a coincidence? How long does it take montezumas revenge to show symptoms?