I agree with @seniormed that you should see a rheumatologist as soon as possible. But it could be that your pain and stiffness will improve in another few days. Here is a quote from Google:
"Inadequate response: If symptoms don't improve adequately within 7 to 10 days, the diagnosis of PMR may need to be reconsidered, or a higher prednisone dose might be necessary." Considering the clock started for you this past Saturday, at 30 mg, maybe you'll start feeling better soon.