I have really bad night sweats as well. Drenching is an understatement. Been through the thermal sweat test which wasnt much fun. No answers for me. I change my clothes 2 or 3 times a night and its pretty tough. I feel for you on that one!! I have something going on and no answers is extremely frustrating. Lymph nodes in armpits were 3cm when the did a biopsy. No malignancy, no infection, no bacteria. Reactive Lymph nodes. Keep me posted if you dont mind as I will keep you posted if I figure anything out