I am 76 yrs. male. My FS on 1touch ultra is today is 123mg/do yesterday it was 105. Range is 110-147. So I am in normal range that means I am not diabetics? My doctor gave me Metformin 500mg twice a day but I was getting diarrhea,nausea, stomach pain so I stopped. I am doing trade mill for 30 mins. every day. No sugar. Tea without sugar , brown rice instead of white rice, fruits( strawberry,Apple, blueberries etc.). My wt. is 183 lbs. and ht.is 5'-10". Please tell me what else I should do.