Hi Lynda
yes, I have dry mouth & it can just be another manifestation of the systemic dryness that comes with menopause. If it wakes you at night do you think you could be sleeping with your mouth open (or snoring
?!) I keep a covered glass of water on the bedside table & swill it round my mouth before swallowing when awake in the night.
If your tongue is coated, natural yoghurt can help discourage oral thrush from taking hold & keep a better balance of healthy flora in the mouth, though may make post nasal drip worse if your immune system is very sensitive. A mouthwash used now & then might help clear the tongue if you don't do that already. Not used every day though, as it can kill off the normal flora. Do continue to keep well hydrated. Plain water especially.
If the dryness really troubles you & nothing improves it, maybe think about asking your GP whether it could be due to Sjogren's. Especially if you have very dry eyes, vagina, skin as well. Though please don't worry about that suggestion as systemic dryness can also just be due to declining hormone levels.
Testosterone can help with dryness, but as you say you are not on medication I take it that includes HRT.
Wx