Jason,
The more nervous you are about the situation, the dryer your mouth will be. It's part of the parasympathetic autonomic nervous system "fight or flight" response. As soon as I calmed down about my diagnosis, the better my dry mouth became. It's not totally moist but it's not near as dry and if I relax when I go to bed I don't wake up with as much of a sore throat and mouth. Perhaps your docs can give you something to take the edge off.
I've had anxiety for 15 years. So, I doubt it all of a sudden became a problem with the dryness. I've had to deal with going to school and work with a chronic diarrhea/gas problem that I had to worry about all day long having an accident and embarrassing myself. I don't work anymore. So, some of that anxiety is lessened with regards to the diarrhea.
Some mention I analyze too much. I don't think I do it enough. I had sinus surgery years ago where they cut out some air pockets in the bone in my sinuses and cut out some turbinates. Later on a different ENT mentioned how dry my sinuses are and didn't recommend anymore surgery based on what has already been done. I later learned when you have turbinates cut out, you run the risk of developing empty nose syndrome. Which is NOT good. Guess what, the doc that did the surgey didn't tell me anything about any long term risks from the surgery like with empty nose syndrome. These are kinds of problems people run into because they don't fully understand the risks or what all is involved. Since the doctors aren't going to tell me, I have to find out for myself.
I saw a Rhmy who gave me some Prednisone to try. He gave it to me like candy. Didn't tell me anything about it other than that is what he usually gives to people with Lupus like stuff. I didn't notice anything so he gave up. But if it worked, I guess he would have kept giving me refills even though he didn't tell me any risks. I had to figure out the risks on my own.
So, yes for my health and benefit, I have to look into stuff myself as no one else will. Example, how many people out there are blind because their docs didn't tell them the risks of Plaquenil toxicity? There are tons.
The biggest side effect of Anxiety meds is dry mouth. So, I don't see the benefit of taking anxiety meds to help reduce anxiety on the theory that the anxiety could be adding to the dryness when the treatment itself probably will cause dryness.