What I don't understand is why he isn't giving you enough refills in the prescription to get you through to a regularly scheduled check up? That is what my doctors do. If I need to call for a refill, then it is time for a check up. When I leave my doctor's office, he tells me, "I'll see you in 8 weeks", and he writes enough refills on the prescription slip for that time period. When I leave the office, I make the appointment for the next visit. About the time I go see him, I need him to write a new script. I guess you should ask him if you could do that. I guess it depends on how often he feels he needs to see you. Is he trying to taper or wean you from the prednisone? Is there some special need that he feels you have? I think those are the questions you need to be asking.
Just my opinion. Good luck!
"If you think you can, you can. If you think you can't, you're right". - Mary Kay Ash