Cm that looks identical to egg whites, same texture and all, means highly fertile doesn't it?

Why would I be getting it the night before af is due???

Does that mean I ovulate a day before af?

I thought I was pregnant. Had white yellow thick creamy almost same texture cm a week ago. And a few vvvfp tests and I'm riddles with nausea and ever so emotional. Maybe it was just mid cycle blues?