that body odor smell just before period

I always know the day I'll start my period bc I'll wake up with that...smell...like sweaty hard to explain doesn't stink stink just . .smells different ...this never fails for me. I have only experienced it at random times before when I was on an antidepressant years back.... well I'm 7 days before period and woke up to that smell! no medications nothing different except I could have gotten pregnant this month (it's a possibility) ...anyone ever get that "smell smell" before bfp?

this is not vaginal odor this is like whole body ...unless you've experienced it ya prob think I'm crazy.