Have you undergone any treatment? Have they done a Pet scan? I had NHL follicular in one lymph node. Had 13 radiation treatments in 2018. So far so good but I often feel very tired and achy but I blame it on age. My inflammation numbers are thru the roof constantly due to an eosinophil disorder . Also have mild anemia due to Getd meds which I have reduced dramatically. All in all my symptoms are manageable some days easier than others. My advice is push yourself to fight through that feeling of exhaustion don’t let it take over. Good luck feel better