Diabetes mellitus , often referred to simply as diabetes , is a syndrome characterized by disordered metabolism and abnormally high blood sugar resulting from insufficient levels of the hormone insulin. The characteristic symptoms are excessive urine production due to high blood glucose levels, excessive thirst and increased fluid intake attempting to compensate for increased urination, blurred vision due to high blood glucose effects on the eye's optics, unexplained weight loss,...
First of all, that's a lot of questions to answer in the small space provided here, but I will try to give you some starting points.
Talking with your doctor...