The doctor may refer you to an endocrinologist. This doctor specializes in the treatment of diabetes. They may also refer you to a nutritionist. This is so you can get guidance on how to eat. I have been type 2 diabetic for more than 25 years. It is possible to lower your blood sugar to healthy levels.

The one piece of advice that I have is educate yourself on the disease. Contact the American Diabetes Association before you go to the doctor to educate yourself and form better questions. Being an dedicated health consumer is crucial.
https://www.diabetes.org/
Until you go to the doctor, stay away from breads, sugary foods, any high carbohydrate snack foods, desserts. Stick to smaller portions of meats, lots of vegetables, some dairy and low carbohydrate fruits like berries.

When you go to the doctor, they will run tests to figure out your particular situation. Everyone is different.

Get educated first. This is key to getting control of the disease. Good luck.