I'm not a diabetic, but could it be the 'dawn phenomenon'?
Also, the bread in the sandwiches and the mini-wheats might be doing you in.
You are probably also drinking sodas with your Jack in the Box meals -- even the artificial sweetness of diet sodas can spike blood sugar.
This is a Seattle GP who is getting great results with his diabetic patients by having them slash carbs and go high protein:

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