advice needed!!!

Emma

OK so for the last 3 days I've had positive pregnancy tests all very faint tho.... Af is due today.... And I've just been to the loo and when I've wiped its like this picture that I will put in the comments..... I'm so worried could it be an implantation bleed or is it AF?? I've got cramps but had cramps on and off for days. 😢