Run do not walk to a doctor's office. No need to be afraid though as you just need some tests to see if you have diabetes and if you do you have many different options for treating it. Plus the sooner the better because if it's just pre diabetes then you may even be able to prevent diabetes through diet and exercise.
You do have classic diabetic symptoms except I'm not sure of the itchy skin one since I didn't have that. But the rest I have had and do have and I've been diabetic for 20 years. All you need is a few simple blood tests and the doctor may give you a glucose tolerance test in which you drink a sugary drink in order to see how your body handles the sugar.
Waiting and not going to a doctor about this is the worst thing you can do because otherwise you could jeopardize your eyesight and other body functions. Although there is no cure for diabetes there are many controls that allow diabetics to avoid bad complications and live a long and healthy life.