Most will say no, because implantation causes the start of HCG and the positive test. That said, I got my BFP at 9dpo. Four days later I had a bright pink then brown bleed that was once in the morning and tapered off throughout the day. It was not like a period, not red, no clots. When I went to my 8 week appt I asked my Dr and she said the baby can burrow in deeper and result in bleeding, which she called implantation.