Conflict with Rheumatologist over taking Prednisone for PMR in AM/PM

I was diagnosed with PMR 4 weeks ago and when I first started I was taking Prednisone at various times of the day and what I discovered was that it worked perfectly for me when I took it in the evening a few hours before bedtime. If I took the same dose in the AM instead, I would wake up with pain and stiffness that I would not have ,had I taken in at night. The rub is my doctor is trying desperately for me to take all in the AM or split dosage in AM and PM. It’s frustrating when my body is telling me smaller PM dosages work perfectly. WHY SO MUCH PUSH BACK? Does anyone else take it at night?