I presume your sugar levels are mildly high and that's why our doctor has not prescribed any anti diabetic drug to you.
Mild elevations of blood sugar can be made all right by means of calorie reduction,diet modification and exercises.
Reduction of weight will tremendously help you not only in controlling your sugar levels but also help you in conceiving.Your weight is definitely high.
I presume your doctor might have tested you for poly cystic ovary syndrome.
Please abide by the advise given to you by your doctor.
Addition of tablet METFORMIN
500 mg should help you ,but don't start it without discussing with your doctor.