Has this happen to anyone?

Alyssa

So AF was suppose to come 12/7 but came 12/9.

I had no warning AF was coming. Usually I cramp 3 days before and my breast get sore but nothing. So it came 12/9, I had some intense cramps and the color was a dark dark red and brown ... not usual. And it only lasted 1 day. When I place the Tampon in, it’s nothing in there after. But when I wipe there is a little spotting. Buts that’s all. Has anyone has this happen? What could cause it?