Good you're seeing a doctor. I had some small ones and I didn't even know what they were. I scraped mine off but it was unpleasant because of the gag reflex. They have an offensive odor and make the breath bad. I agree there must be a logical reason even though they're common. Maybe it's the bodies PH is off. Even my 13 yr old had them. Try taking vitamin C daily and starting eating yogurt - this will balance the yeast in the body. You may be having post nasal drip and not know it or maybe your mouth gets dry when you're sleeping. Let us know what the doctor says and good luck.