Welcome to HCM,
After going through your history. you was detected diabetic type II in 2011 september,but you started with tablet which contains 3 drugs that is why you developed low blood sugar
level, but then you started exercise and diet which is basic lifestyle change.
This is good you are monitoring your blood sugar level, but you need to consult good physician or Endocrinologist
and you should go low dose and slowly increasing dose of Metformin
You can continue diabetic diet which is 25 Kcal/kg body weight and please continue exercise like brisk walking.
Even fluctuating blood sugar
level is not good, you should get your HBA1c which will let us know about average blood glucose
level in past 2-3 months.
Please have faith in your treating Physician.
Please take care.
Dr.Akhilesh Dubey M.D.