Thanks Alysia, Nat and Pete for your replies.

I'm starting to get slightly better. At least I can walk a little again.
I'm also getting physical therapy 3x/week which helps a lot with these roving arthritic pains.
I think I'm going through prednisone withdrawal and not a relapse (?). It's so scary not knowing for sure.

Fortunately, the monthly labs (CMP, CBC w/diff) came out fine.
I'll get a rheuma factor, sed rate, ANCA panel in a month.
Dr. recommended that I restart taking Pred 3.5 mg/day, but I'll try to hold off as long as the labs remain ok.

I read somewhere that the body produces an equivalent of 5mg of prednisone.
My 1mg/2weeks tapering from 5mg down to zero was a bit cold-turkey and painful.
Perhaps going from 5 to none jump starts the pituitary glands back to work.

Ed.