Diabetes? In my opinion not.
Not to say you could have this plus be Diabetic as well; that's possible.
Please get this sorted ASAP.
Is diabetes a possibility there is a history in my family
Sounds like you have a case of Thrush going on in your mouth, but this is secondary to something else going on.
Taking into consideration all your symptoms, sounds like a salivary gland issue related to an infection or obstruction or POSSIBLY some type of autoimmune disorder, i.e. Sjogren's Syndrome.
That would be my guess.
Based on what you know, have seen, what do you think it could be?
No just wanted to think of potential causes before I go