Confused! BFP after missing a period for week?

K
So I was suppose to start my period on 9/11. I took a pregnancy test on 9/13 since I hadn't got my period and it was BFN. I still have not started my period, and have no symptoms of it starting. I have thick, creamy discharge and my temp has stayed over 99.1 degrees Fahrenheit. However, I stopped BC two months ago but my 2 periods stayed regular after stopping Has anyone gotten a BFP a week after late period??