several vector born infections that case extreme fatigue and PEM as part of their symptoms picture are also known to cause drenching night sweats as a classic symptom.
Babesia in particular
it used to be considered largely a disease affecting those with immunosuppression only ( eg patients on organ transplant immune suppression drugs, splenectomised patients and AIDS patients )
however, its general prevalence and in particular its prevalence in immunocompetent patients is increasing