I'm so sorry for your pain, KK.

It's unusual though not unheard of, to take Prednizone for pain.
All meds can be bad for you and addictive, if taken often and in large quantities, but this is meant to be a temporary measure, I believe, so I would do as the Doc said and increase the dose, knowing that this is not going to last.
when the pain has subsided, you may want to titrate down off of the predizone, to make it easier on your body.
Let us know how it goes and take care.