Implantation bleeding or AF coming?

I posted earlier about this, still haven't got my mind off it.

I'm 13dpo today (Sunday here). Last friday, 11dpo, i felt somethung came out - had a creamy discharge, very white and only a small amount. A few hours later, a streak of brown blood.

Now, i'm 2days late, been having slight back ache, a bit of cramping (mild) like af is coming, and sore boobs. Tested today, bfn.

Still sooo confused if it was implantation or just af giving me a piece of what's about to come of her😫😫😫