Annette.. if you do soft drinks (especially Gatorade.. which is actually a good suggestion) try to pick ones with a lower sugar content or diet if possible or you'll wind up aggravating situations on the "other end", if you catch my drift..
if there's a local drug store there's a product called "Pedialite" or something like that which is really good for replenishing fluids without all the sugars that can cause.......
diarhea ("Cha-cha-chaaaa"... sorry, couldn't resist!

)
Hope you're doing better soon...