Implantation bleeding???

Daniella

How long does implantation bleeding last and on the average how much blood comes?? I took two pregnancy home test kits and the results conflict with each other. I was 4 days late but I am bleeding now I don't know whether it is jux my period or implantation bleeding. Had two Maxi pads full of blood yesterday but today the bleeding seems very minimal. Pls help I am so confused