Photo: Andrew Burke-Stevenson/Boston Globe/Getty Images One morning in late September, I drank a cup of coffee without sugar and ate half an English muffin for breakfast. Boring choices, but I like routines; I always drink coffee in the morning, and I always drink it with some milk. If I eat breakfast, I don’t eat much. I didn’t think it mattered — I still wouldn’t, if I had any choice, but two hours later, a medical assistant pricked my fingertip and told me that my blood glucose was 330