What did your Mom learn at her appointment this week? Were any ideas towards healing offered?
Also, this article was referenced in Connect a few days ago, I think it is worth reading simply because it shows 1) post vital symptoms are not that well understood, and have gone on long before Covid, 2) many doctors and scientists are as puzzled as we are, and 3) research is underway.

I will suggest a 3rd possible cause for you Mom's sever reaction - having both the Shingles virus, and Covid twice, are a triple assault on her body. My suspicion is that the combination of Shingles and the first Covid infection affected her immune system in some way.

At this point, connecting with a comprehensive Covid rehab program may be her best option, as they keep cureent with all the latest treatment and therapy choices.
I wish her healing, and peace of mind to bothof you!
Sue