Catherine, illness can affect levels also (as can other things). You might want to start keeping a diary of not only levels, but exercise, what you ate and when, and even sleep and how you feel day to day. It's a pain, I know, but I found my mixed levels were greatly affected by how I felt, illnesses at the time, when my levels fluctuated. Also, many meds, incl. over the counter, can greatly affect levels, esp. steroids. I hope this can give you some answers.