carsok, Bless you. You have really been through it and I am so sorry.

I've had COVID twice with the first time being the worst with double pneumonia in 2022 and ended up in the E.R. The 2nd bout in 2023 was milder, but, took a long recovery. Too many lingering symptoms to mention.
I was diagnosed with Long Covid in 2023. Three of my doctors do not acknowledge Long Covid.

I went to an Integrative Medicine Doctor that treats Long COVID. I did the infusions with vitamins for my immune system and then I did the Glutathione. I reacted to all of them because I'm sensitive to so many things.
This may be a route for you to try. If a Concierge type Doctor is the same as an Integrative Medicine doctor,
then it may be worthwhile for you. If you have bloodwork done, insurance covered mine through labcorp, but, the visits
were out of pocket. Is there a COVID recovery clinic near you?

Sometimes, talking to a Compounding Pharmacist, they can recommend doctors for Long Covid that can think
"outside the box".

I am praying for you and wish you the best. Bless you.