"At times I will get so jittery out of no-where, shaking and I have to eat something right away. I eat three good meals and snacks a day."
That one statement sounds like a low blood sugar problem. As a diabetic myself, I know the feeling.
Since Prednisone raises a person's bloog sugar levels, your's may be going the other way because you are tapering down from a higher level. You might want to see your GP and get tested for blood sugar.