Help plz implantion bleed tmi

Kaylie • Luv my kids! megan, yiannis, jack! Rip dad 20/3/43-09/07/15
So for tmi I had pink wen i wiped after loo trip nothing monday tuesday had tiny bit red then brown but not enough to fill pad or to be af nothing today got few cramps wat do u others reckon for implant bleed preg test still bfn got blood test monday xx thanks in advance x