Implantation bleeding to a BFP time

I am just wondering how long after implantation bleeding that you saw even a vvvvfl on a home test. I had some spotting yesterday which is unusual for me. A.F is not not due until Monday or so. I took a test this A.M and did not even see a glimmer if pink. I know it can take a few days for hcg to accumulate, but just wanted to know if anyone got a bfp sooner? I thought maybe since it was darker in color that it was older, and maybe implantation actually happened a couple of days ago. And sorry if this has been asked before, I am kind of new here.