Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain
oral thrush is yeast infect theion and generally involves the tongue that leads to formation of white coating over the tongue..
It has a number of variants and is not always painful, therefore it is not necessary that white coating on tongue caused due to yeast infection is diagnosed as thrush if it is painful..
Secondly
dry mouth can occur secondary to oral thrush..
I would therefore suggest you to consult an Oral Physician and get evaluated and he can do a clinical evaluation and also do a microscopic examination of scrapings from the coating and confirm the cause..
In case of oral thrush medications like
Nystatin mouthwash,
clotrimazole lozenges and oral medications like
fluconazole, itaconazole etc can be advised to you..
Along with it taking more of probiotics like Yoghurt and garlic can be helpful..
For dry mouth suck tart candies and chew sugar free chewing gums..
Drink ample of water..
Hope this information help ..
Regards.