Fatigue and/or drowsiness is a classic
symptom of Hyperglycemia (t2
diabetes). Others are Dry mouth, Thirst,
Frequent Urination, Blurry vision, Weight loss, and Increased appetite. You need to see a doctor and get tested for diabetes: an OGTT (oral glucose tolerance test), a fasting glucose test, or an A1c test. If diabetes runs in the family your chance of getting it is higher than most.