Thank you for your query at DoctorSpring.com
Do you feel some kind of enlarged nodes in your armpit ??? It would be better to seek immediate medical attention in your case.
Generally EBV infection can cause lymphoma but after a long latent period. Usual infections are self limiting. They are tackled by body's immunity cells.
The initial symptom of lymphoma is node enlargement which may or may not be associated with fever, drenching night sweats and significant weight loss. But all these symptoms need not be present all the time.
I would suggest you to do a complete blood test with renal and liver parameters study. An imaging may help in the current situation. If feasible , I would suggest for a nodal biopsy and get it reported. If needed, you can request the pathologist to give you the complete specimen with the stained slides for a second opinion when you travel home. This may fasten the process of diagnosis at your home country.
I would strongly advise against using a steroid until you get the biopsy.
I hope this addresses your concern . please revert back in case of any queries. Can you attach the latest CT scan reports for perusal.
Feel free to discuss further,