Hi Kate @nowforyou, Sorry to hear you are still struggling to get a diagnosis. There are quite a few conditions that mimic PMR and share similar symptoms. Here's an article that might shed some light.
--- Diseases that mimic polymyalgia rheumatica (PMR): https://www.medicalnewstoday.com/articles/diseases-that-mimic-polymyalgia-rheumatica.

You are not alone and there are several discussions where members have questions similar to yours that you might want to scan through to see if any are the same.
--- Questioning PMR diagnosis: https://connect.mayoclinic.org/discussion/questioning-pmr-diagnosis/
--- Any difficulty in diagnosis of PMR?: https://connect.mayoclinic.org/discussion/any-difficulty-in-diagnosis-of-pmr/
--- Was I properly diagnosed with PMR?: https://connect.mayoclinic.org/discussion/was-i-properly-diagnosed-with-pmr/
--- Do I really have PMR?: https://connect.mayoclinic.org/discussion/so-i-really-have-pmr/

You might also find this YouTube video helpful.
--- Polymyalgia Rheumatica: A Rheumatologist explains: