I went through the same thing. The Doctors can do nothing. I had blood drawn every other month for a year. ID doctor said she couldn’t help my CFS.
I did the Anthony William diet protocol. Check out his book ‘Cleanse to heal’ it talks about EBV virus and how to kill it off.
To fully restore my energy my GF kindly sent me a case of Asea redox molecules which have been amazing. Don’t do amazon, more expensive as not wholesale ( I’d question its quality too). I can send you some links to watch. I hope that helps.