No conventional Doctor was able to figure this out. I went to many. I ended up with an Integrative Doc and they ran lots of bloodwork. I too had mono in High School. My GP says I’m ‘depressed’ and that’s why I’m like this. I have a response to that comment but will refrain from posting it.

Long Covid can reactivate EBV.

EBV NUCLEAR AG EBNA AB IGG
and
EBV VIRAL CAPSID AG VCA AB IGG
To detect a reactivation.

I can’t seem to get my numbers below 600.
“Rollercoaster of nonstop symptomatic hell” accurately describes it. I feel ridiculously bad today.
I hope you find your answers. I’m here if you have other questions.
I wish I could tell you when it will resolve. Good luck my friend.

Not sure if you got a proper response to this yet, but YES most people who end up with long haul have a history of mono, ie Epstein Barr. I sure have a history of it, although with years of high stress environments (work related and home related stress). You can try to treat the re-activation of Epstein Barr but also know that heavy supplementation will help you immensely. If you only start one thing today, take B-3 (must be niacinamide form, non-flushing, 500mg 2-3x per day). The B-3 is absolutely key, but if you can also take a very high quality B-Complex that helps too. Also, anti-inflammatory diet + low histamine diet is CRUCIAL also, to reduce the levels of both in your body.

I'm going to write up a full summary/protocol of what I used because I AM back to normal and working full time (it took me about 4-6 months to get back to work) -- it's just too much to try to respond to each individual here. But by treating the ROOT CAUSE of the nutrient deficiencies in the body you will manage all symptoms. Your western medicine Dr will NOT have a way to do this, nor an understanding of this, because they treat symptoms one by one, and only know how to prescribe. It is possible to heal this with food and supplementation. All the best to you!