Are night sweats a sign of early pregnancy or something else?

🌸 Crystal 🌸 • TTC #1 since January 2014
I've never been a hot sleeper before, and I keep my house at a comfortable 73-75 degrees. The past few nights I've woken up drenched in sweat. I know that's common during menopause, but I also know that during/after ovulation if implantation occurs your bbt goes up and stays up. I'm 3 days before AF due, taken a few tests all negative. Still might be early though. I had mild cramps 2 days ago and they were nothing like pms cramps. Has anyone had this and it ended up being due to pregnancy or something else? No fever or anything, but my bbt is higher than normal.

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