I'm not sure how this could work but just wanted to highlight one thing about night sweats.
THEY CAN BE A PRETTY SERIOUS SIGN OF UNDERLYING HEALTH ISSUES.
I dont want to fear-monger but I used to get the drenching night sweats you described and put it down to my pretty extreme cutting diet. I later found out I had a rare form of cancer and night sweats are one the key symptoms. I really wish I had been more aware of this at the time as it could have lead to an earlier diagnosis.
I have read your biggest loser posts and it probably is down to your extreme dedication to that but it might be worth telling your doc.