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