People who throw spitballs will be sent to their room with NO ice cream! 
OK...
If it is yeast...
Nystatin liquid suspension is a rinse that you can use to help kill the yeast. You rinse for 2 minutes.. then swallow it.
It is a prescription medicine... so a doctor would need to prescribe it.
In the meantime.. while waiting..
Take a cup of warm water and mix in about a tablespoon of vinegar.
Swish and spit.
Repeat.
This MAY help cut the yeast for a short time and give you some relief. I use to keep the cup in the bathroom.. and every time I was in there I would use it. Then I used a mouth wash.
Some folks use Diflucan for yeast.. a tablet medication (prescription)... but I like the Nystatin the best.
An important thing to do is cut back ... WAY back.. on sugars. Natural ones or otherwise. Sorry!
Sugar feeds the yeast... so we try to starve it out.
It will be VERY hard to do for the first couple of weeks.. but if you can make it that long.. it will be easier.
Are you taking any acidophlis?
This will also help.. but is NOT a yeast "killer" of sorts. It will help replace the natural bacterias in your system that are needed to properly digest your food.
Now. if you can't get a prescription for yeast right away...
Many folks use.. with good success... a product called Caprylic acid.
It can be purchased at a health food store. It was determined in tests to be as effective.. or more effective than prescription meds for yeast.
I have used it and have found it worked well.
I hope this helps some.
Let me know.
And... side note...
Lyme? who posted earlier here is right. It can be part of a neuro thing with Lyme folks. Kinda the opposite of dry mouth and dry eyes. I hadn't thought of that at this point.. so I am glad it was mentioned!!
If the tongue isn't pink and pretty though.. my first thought is to try the yeast meds and see how they do.
I am not normally a "spitter".. but I suddenly developed the WAY too much saliva and HAD to spit constantly.. or choke. Luckily I was in the woods camping at the time.. alone.
So my "UN-lady like" actions were not seen by others.
Lettuce no if this helps.
