Some symptoms you might have experienced:
Feeling generally tired
thirst
frequent urination
frequent infections/fevers
slow healing wounds
gum disease/tooth decay
high blood pressure
high cholesterol and/or triglycerides
blurry vision
difficulty with liver and kidney function
a sweet smell in the urine
difficulty breathing
depressed appetite
frequent nausea
headaches
pounding heart
hunger
difficulty waking up
irritability or bouts of anger
personality changes