Hello Marina, welcome to our community! Your fasting number is good and the other numbers are not bad considering you had a GTT. It is too early to say that you are diabetic. Are you seeing an endocrinologist (diabetes specialist)? Your doctor may be very good but a specialist might be more appropriate for being sure of a correct diagnosis. If you are diagnosed as diabetic you may be given a C-peptide test to see if you are Type 1 or Type 2. That is very important because the treatment prescribed depends on the type. If I were you I would test my blood sugar before breakfast and two hours after eating to see what effect the Metformin is having. Let us know the results if you decide to do this. Good luck to you.
Richard
Richard