Sweetness in mouth. Do if i am affected.

I have checked my random sugars two three times it is always 124 , 131,93 once  and below 140 evry time. But fasting blood sugar was 117 and 104 and above 100. So doctor taken HB1Ac, that was 6.6 once and 6.7 once. Now doctor asked me to take much water and have to good sleep. One week back I have gone toilet once in a hour. But it was one day. Next day normal. Today I am feeling light sweetness in my mouth. My random blood sugars are always below 140. But Fasting sugar and HB1Ac showing higher than normal. Kindly guide me ...and whether I am affected diabetic. Last three months I am doing regular walking for one hour. Even I stopped consuming sugar also.only after noon I am taking rice. Evening chapathi. All this life style has been changed ...what to do if i am affected ...kindly guide sir