@Roberta,
Sounds like you could do with a big supply of really good lemon drops. They always help with the saliva production.
These are my favorites.
The site has several other flavors if you aren't yet able to handle the acid in the lemons. Those pear and blackberry ones are excellent too.
http://www.chocolat.com/browseproducts/Cavendish-and-Harvey-Sour-Lemon-Drops.HTML
Cavendish and Harvey Coffee Drops - Net wt 7oz (200g)
Cavendish and Harvey Butterscotch Candies - Net wt 7oz (200g)
Cavendish and Harvey Mixed Fruit Drops - Net wt 7oz (200g)
Cavendish and Harvey Multi Vitamin Drops - Net wt 7oz (200g)
Cavendish and Harvey Pear and Blackberry Drops - Net wt 7oz (200g)
Cavendish and Harvey Sour Cherry Drops - Net wt 7oz (200g)
Cavendish and Harvey Sour Lemon Drops - Net wt 7oz (200g)