Having done some research, I've just realised that my increased thirst/water retention and dryness (including vaginal) is due to progesterone (Utrogestan 12 days a month orally 200mcg).
I only get these symptoms during these 12 days so pretty sure it's Utro causing it. Also get what feels like pressure/sinus headaches.
Any tips beyond drinking more water and using eyedrops etc?
I already use Vagifem/Ovestin/Oestrogel plus Yes for reference.