Do one simple test: avoid all sweets for at least 4 or 5 days, including fruit. See if it improves, and if so, whatever parasite it is (if it is one) thrives on sweets. I did this, and at least now I have a feeling of control, that if I can't deal with night sweats then I must avoid sweets, and voila - success. Still working on getting rid of the parasite altogether, but at least you'd have a feeling of control over the situation.