Try to stay hydrated and try a BART diet (bananas, applesauce, rice, toast). Don't want to overstimulate your system anymore than it already is.
A lot of folks don't drink the local water, but don't think about what the ice cubes in their drinks are made from
Hope it passes quickly. You could always think of it as a free "souvenier" from
your trip? Would suck if this lasted longer than your trip did.