Welcome @christineb23, It sounds like you may be tapering too fast. Each of us are different. You might find this discussion started by @dadcue helpful, it has some good references that provide and explanation:
-- How to Slowly and Safely Taper Off Prednisone but ... no set rules.:
https://connect.mayoclinic.org/discussion/how-to-slowly-and-safely-taper-off-prednisone-but-no-set-rules/
My PMR experience with 2 occurrences 6 years apart starting at 20 mg prednisone for each - the first time took 3 and half years to taper off with the last six months going back and forth between 1 and 1/2 mg prednisone until I could stop taking it with little to no pain. Second time it took me 1 and half years to taper off.