Tell me your thoughts!

I got a BFP on 12dpo and I started bleeding when AF was due and I thought my pregnancy was over or had a chemical pregnancy! So I just counted it on that but I had no big clots or cramping at all! I was just bleeding! So I didn't go to my doctors appointment on Friday because something came up so I just chucked it up as anothe baby lost. But this morning I took a pregnancy test expecting it to be negative and it was postive so I am super confused!! Could I still be pregnant or is HCG still in me and just still getting out of my system!! I need you guys help!