Why do I feel so horrible? I have had hot flashes, on and off, for a couple years now. But, last few months I am constantly very hot and sweat pours down every part of me as if I was standing in the rain. I need to change my bedsheets 3 times in one night. Also, the sweat has changed to a sticky, smelly oil. Almost makes me sick.i have gained 20 lbs. and have trouble breathing. I can't function, due to dizziness, and need to keep a fan on me at all times. Is this normal for menopause? How long does it last?