Untreated/undiagnosed diabetes symptoms can include with
Type one (onset childhood, usually undiagnosed until after age 20 (from US gov website):
Fatigue
Increased thirst
Increased urination
Nausea
Vomiting
Weight loss in spite of increased appetite
With Type two (adulthood onset):
Blurred vision
Fatigue
Increased appetite
Increased thirst
Increased urination
So, please get your blood sugar checked!
Also, any new type headache deserves a scan of the head to check for tumor. If you have a pituitary tumor (they'd base ordering a scan on if you have one or more abnormal endocrine test), that takes an special MRI (dynamic w/and without contrast) to look for, not just a plain brain scan.
nope never had them checked
Have you had your blood sugar checked lately?