Hi thanks for your question
You have two issues. Lump inside your throat, associated with fever and chills and you think it is lymphoma.
Second issue indigestion
and burning pain abdomen.
I think your Doctor may be right, it could be pharyngitis
(infection of throat) caused by streptococci. It is not necessary, that you will go out and only then you will get streptococcal infection
, you can get it even at your home.
Try a course of antibiotics and antihistaminic and decongestant ,hope fully you will get rid of these symptoms, if you symptoms remain persistent after a course of treatment ,only then, you can get yourself tested for lymphoma.
Your indigestion problems could be due to Gastritis
, Take a course of pantoprazole
and discuss it with your treating physician and you may need upper G I endoscopy.
Hope this answers your question