Confused!!

This past monday, (a week before Af is due ) I started spotting. Happened with 2 stops at the restroom and was done. I though that was strange as i am like clock work. Then tuesday, a start lightly spotting but was bright red. However this needed no more that 1 pad the whole day. Later that evening, it stops leaving me with a clean panty liner the whole night. Same thing weds. Now yesterday and today is just brown spotting , but barely. And now as of a few hours ago it's done?? I took a PT and got a BFN 😕