hi there, to be sure that you are diabetic you need to have your fasting sugar and post prandial sugar levels done asong with HBA1C levels and if they are all out of normal range then you will have to assess the severity of your condition and one needs to judge that it is viable to controll them with diet and exercise alone or you will need oral medication or injectable one. It is not wise to try doing so on ones own accord and it would be better if you took a physician consult. For the time being you could go on a carbohydrate concious diet and include some form of exercise to reduce weight if you are overweight. You could include flava beans in your diet as they are known to reduce glucse levels in blood . Besides you could substitute complex carbohydrates in place of simple carbohydrates in your food. Cut down on the intake of sugars in tea and coffee with artificial sweetners.Tho I would advise you again to visit a physician as is obvious and take proper action. Take care.