Is blood glucose reading of 139 ok two hours after eating? I've just begun self-testing and I've had three readings of 88 (afternoon, no food), 89 (morning before eating or drinking), and 139 (two hours after eating). My mother's family has Type I diabetes (8 out of 11 total) and my father developed Type II before he died. I'm concerned because I have very high "highs" and very low "lows" complete with blurred vision, shaking, anxiety, and constant urination.