I had extreme exhaustion for years with no results. I did have the EBV and had it but my Drs didn't discuss with me. Still can't find a Dr that feels like their confident in reading my results.
However, I also have 2 mutated genes for MTHFR and 1 for COMT. You can get a buckle swab online to test Amazon or other. This was cheaper than my lab as it wasn't covered by my insurance. I'm just in the beginning of this but I take 7mg to 15mg daily of L- methofolate and after 1 year I'm still getting more focus, clarity and my energy back! Huge!!! I started this at 7mg before I had the test and I noticed a difference in the first month or two. I took the test just for my own knowledge. I used BodyScience to get bukle swab and they provide a free informative report and 15 min telephone consult after you have your results.