For the past few months I ve been having episodes of light headedness, vertigo, persistent vomiting, fatigue, and I ve had my blood sugars test both at 35 ml and at 214 ml. The 35 ml most recently was after I had 1/2 cup cup fat free cottage cheese with a cooked egg and some green tea. I went to the doctor and their tests showed absolutely nothing wrong. I ve used multiple different blood glucose readers and they ve all shown me to be either very high or low, what is going on? Their tests show my A1c at 5.0%, but if I ve been having these episodes what else can it be?