Pre-AF or pregnancy CM?

I used a glove because I can never see it on my hands well. I'm 10 days away from AF being due and have been BD every day since August 7th. It's very watery, non sticky. No scent and it's white! When it leaks into my underwear it's enough to feel like I've peed a little. Any hints on what it could be? Pre-AF or pregnancy?