Wow your comments are so incredibly close to my personal experience it's pretty amazing. So my early signs were exactly as you suggested. I play golf and suddenly started to develop what I thought was sciatica or piriformis syndrome. This started in mid March. So to combat this I upped my gym sessions and stretching routines. Didn't help. Then I took possession of a new house purchase stary of May and it too was a total renovation job. I spent MANY hours either non stop renovating or working and then renovating. I was getting more sore... Hammys, shoulders hips... But I said to myself it was the renovation work and different muscles being used.. Nearly 8 weeks of that finished off by a house move and the pain was at top level. I should have realised it wasn't normal that a regular gym user and person who exercises would be that sore after some different movements.

If your wrists, fingers, ankles and toes are all feeling okay but your hips, shoulders and neck are stiff and painful to extend this is exactly how my symptoms arrived. A blood test showed very high inflammation markers and the doctor prescribed prednisolone for me. Wasn't a miracle drug. Didn't make me feel instantly better like before but definitely allowed me to get up off the sofa or out of bed without major pain or effort.

Hopefully you can get a few tests to help you identify if you too have high inflammation markers as that wouldn't be the case if you just needed more PT work in the gym or had piriformis syndrome. I can definitely testify to that as I already have travelled that same path.