Over imbibed?

We explored everything Manchester had to offer yesterday and am feeling the effects of that today!
For the first time in my life, I'm experiencing the burning discomfort of indigestion. What a bum deal! Just thinking of food or drink turns my stomach.
I can now totally appreciate the visual images of a pot of acid bubbling away - what do you do to recover without taking Rennies or other antacids?
Mine went away the next day - must have been all those Belgian fruit beers, but what if it had carried on?