I'm asthmatic and had to take a week long course of oral steroids. I was warned by the doctor that they would mess up my blood sugar levels and they did. It all settled down again within a few days of stopping taking them.
I think that everyone's getting wound up about this. I'm type 2 and decided, when newly diagnosed, to try to control my diabetes purely with diet. However, I was also a chocoholic and that meant not going near it, not getting even the smell of it until I had got used to not eating or even...
Try varying your exercise. I was told that the body gets used to what you do regularly so you need to change something in your exercise routine to 'wake it up' & get it going again.