Hello dear lets go through queries one by one
You are young have thrist and urination problems you have family history of diabetis plus once you felt dizzy too ,,,,,these are quite suggestive of diabetis but make you self examined by medical specialist ,,,take three consective morning blood sugar samples provided you have 12 fast.....take. Two hours post parandal levels too,,,,most diagnostic is oral
glucose tolerance test ,,,,do it as well,,,,do your fundoscopy as well ,,,go checked your urine for traces of sugar and
albumin ,,,this all will help you reach your diagnosis,,,stay blessed