I’m so sorry you are a recent widow 🥲, but so glad you have helpful friends….
All of this must be very stressful for you and I’m sorry if I confused you with my comment .
It is pretty normal (at least for me, lol) to experience muscle and joint pain for s day or two after you overdo it with activities. I’m also dealing with inflammatory arthritis as well as PMR.
I would suggest trying some extra-strength , rapid release Tylenol gel capsules and get a topical creme like Aspercreme, original formula and massage that on the painful areas. Use your judgement—if you feel the pain is excessive and you don’t get any relief from OTC remedies, you should consult your doctor.
Hope this helps you.

Many of us seem to have age-related arthritis and perhaps other conditions that has been masked until now by our natural production of cortisol. As we taper, and the prednisone is no longer sufficient to suppress the symptoms, we experience various levels of discomfort until (hopefully !) our cortisol production improves to again keep the inflamations in check.
All this presumes that your prednisone treatments have been of sufficient dosage and duration to put the PMR into remission. Until and unless that has been achieved through testing, starting a taper program will probably not be successful, and the pains might be PMR and not those which are better treated by something other than prednisone. Best of luck to everyone.