Can ebv reactivation cause swollen lynph nodes for months?

Yes, EBV could do this. But whether EBV is the cause depends on information you don't provide: Where are the enlarged nodes? How many? (It's not EBV if only 1-2 nodes.) What other symptoms do you have? EBV diagnosis is complex. What tests were done? Do not rely on HealthTap for a diagnosis; keep working with your doctor. If any doubt, ask about an infectious diseases consultation. Good luck.