Implantion spot

Bunny • ttc 4 years with 2miscarriages. Rainbow BABY GIRL born 3/10/18💕🌈 Due with baby girl #2 03/02/19
i had what i believe is an implantion spot on 6dpo, it was really really light pink. i tested today at 8dpo, bfn. how long do i have to wait before bfp? i feel super pregnant