What should someone look for when concerned about tonsil lymphoma?

A good ENT: Enlarged tonsil, lymph nodes enlarged. Sore throat, difficulty swallowing.

Why ?: Why you are thinking about lymphoma? Upper respiratory infection likely tonsillitis is way , way, way more common than lymphoma. The fatigue, body aches, cough could be symptoms of viral infection for instance. Don't stress yourself more on this thought. However, if you don't feel well- go to see your md and get yourself checked. Practice of relaxation, yoga, meditation; exercise would help you.