I've had night sweats during my period since I was 18. My doctor even did a blood test to make sure I'm not going through very early menopause, but I wasn't. She even put me on progesterone for a cycle or two before I swore it off due to wild mood swings.

I know when my period's coming as I start sweating a night or two before it starts, and it'll go for about 3 or 4 nights after that. I've tried various herbs to try and curb this but so far haven't found anything that works all that well. Wild yam extract does seem to help with my other pms symptoms but not much for the night sweats. Ick!!