What a bugger Michelle. I really don't totally understand the way your body reacts or whatever it does to insulin. I too eat exactly the same things most days and sometimes I really can't work out why I am having high readings, it really bothers me. The only things I look for is if I am tired or stressed at work. This is my last week at work, so I am confident that I should be able to get the GD readings more under control.
I am truly hoping I don't have to go on insulin, but if it is the best things for bubs & me I will. I've heard that as you get along further in pg the GD gets harder to control.