For several years (during both of my pregnancies and the time in between) I maintained  A1c levels of 5.8% to 6.3% (this falls within the ADA's recommendations of "Tight Control") and my doctors were thrilled. BUT these levels were due to dramatic daily highs and lows, which lead to a lot of danger, uncertainty and stress. I often had no idea what was causing high blood glucose levels and would blame my pump, or my calculations, or myself.