I think most “veterans” on here would agree that you do not continue prednisone simply because it makes you feel better. That would seem to be the “addiction” that my rheumy warned me about at the beginning of my (now successful) treatment for PMR after ruling out most other possible causes of my condition.
There are many conditions besides PMR that can be causing your pain, and which should probably not be treated with prednisone.
Pain is a symptom, not a disease, and all pain is not PMR pain.
From what you have related here, I would suggest that it is most important that you pursue a diagnosis, and then decide on an appropriate treatment. Your rheumy is not crazy.
Best of luck.