Her PT said she's been seeing lots of these.
She never had covid. I hope she gets better, it's been really difficult.
Some of it can simply be stress/anxiety which - if not managed - accumulates as whatever condition emotionally feels like it is "not resolving" and produces similar symptoms. If everything checks out, stuff like Omega3s, VitD, Glucosamine, Chondroitin and a good 3-4 week vacation to unwind are all greatly associated with reducing chronic inflammation.
I think the challenge we're all facing is Dr's are so overwhelmed with all these "inflammatory"-type conditions where some stuff can slip under the radar but they're all inclined to blame it on anxiety/depression. COVID has been a sneaky fucker wrt asymptomatic infections.
The best thing you can do is take as many stressors off the plate and give it 6-9 months. Better 6-9 months off than a lifetime of wading thru chronic issues.
This doctor might be able to help, he’s been doing a lot of research to long covid.