I was diagnosed with DM a week ago. My A1c came in at 10.4 and my fasting BG was 171. The doctor put me on 500 mg Metformin to be taken at breakfast. Mostly, I feel fine and my morning BG is down to 140. I spike to between 170 and 200 1 hour after meals and am lowest after I exercise -- at 95. I'm fine with cutting the carbs and starches, etc. But 2 days in the last week, late in the afternoon, I felt nauseous and very fatigued. My blood sugar during these times was right around 135. Any one have a clue as to what might be causing me to feel sick and tired?