Hello, this is Dr. David. I have read your question and I'm ready to help.
lyme disease tends to cause fevers and joint pains and rash on the skin as symptoms.
it doesn't sound like you are having fevers at this time.
your symptoms sound much more like reactivated mononucleosis with enlarged lymph nodes and severe fatigue.
if you haven't been getting enough rest recently, this can suppress your immune system and cause a relapse of your mono infection.
you need to help improve your immune system to help fight off this mono infection.
eating more fruits and vegetables and less carbs and fats can help improve your immune system
regular exercise 3-5 times a week can help improve your immune system
you need your thyroid
hormone levels checked as well
very high or low thyroid hormone levels can affect your sleep and cause problems with your immune system.
you can get new testing for lyme disease infection now, but I suspect it will show no active infection currently.
also you should ask your doctor to check for B12, vitamin D
and iron and ferritin levels. low levels of these can also cause fatigue as well
let me know if you have questions.