A quick note for people responding, you might have a mild form of vascular dysregulation or flammer's syndrome. It can manifest as migraines and a decreased sensation of thirst, as well as other symptoms like cold extremities.
Afaik it's pretty harmless in general but it is associated with certain vision issues (normal tension glaucoma). Glaucoma is irreversible but has many treatment options especially if caught early. But you MUST go in for a (fast, cheap, painless) screening to catch it, it's really hard to detect unless there are issues otherwise. Please consider this if you really are showing a lot of these symptoms.