How many days after implantation bleeding did you get your BFP

I am currently on cycle day 55. This is my fourth cycle off of the nuvaring. My first few cycles were a little off but the longest being around 35 days. For the past 4 or 5 days I've been lightly spotting maybe once a day and just when I wipe sorry tmi . . I thought maybe it was implantation spotting but four days later and I'm still getting negative s. Any advice? Any experience s ? How many days after implantation bleeding did you get your BFP? I'm starting to get really stressed . .