Tried Immunosuppressants?

One theory of long-COVID is that your immune system gets stuck in an over-reactive state. That really resonates with me and seems to describe what is happening in my body. I had COVID March 2020 and still significant long-COVID 5 yrs later. I over-reacted to the 2 vaccines I had and thus felt worse for 4 months after. I have never had COVID again, but anytime I have had a known exposure, I get a long-COVID episode with major symptom flare-up. I feel like my fatigue is from my system being on high-alert all the time, and my inflammation in upper back and chest from my body thinking there is a virus when there is not.

I want to solve my own problems because I'm tired of waiting for the medical community to do it (aren't we all?!). Taking immunosuppressants for awhile seems like a logical step to me...if my system is over-reacting, tamp it down for awhile and let my body heal. Has anyone tried this? I just asked my primary doc and she said she cannot prescribe because she is not familiar with these drugs, and referred me to an allergist who I also doubt would prescribe. I am trying to figure out how hard to push to pursue this route and wondering if anyone else has tried it.

thanks!