Hi and sorry you are ill. I would ask your doctor if they would send your blood to:
They test for many different types of lyme and co-infections. It is much more accurate. The problem is you may have to pay for it if your insurance doesn't. But I think it is worth it.
You can get chronic Epstein Barr . Have you had the EBV testing that has early antigen, EBNA, etc. and the various types of antibodies , and antigens? It is much better than just an ELISA test. It can tell if you are new, recurring etc.