How many days after implantation?

Paige • 23- UK. Our little pea due November2017 ❤🌈🌞
Just wondering how many days everyone got their bfps after having implantation bleeding? Its been a week now since I woke up & had what I think was implantation bleeding. It lasted a day and a half and was small quantity of brown blood but im still getting negatives on tests. Any advice? Tia x