positive???

Period due in 2 days so I took a digital test -target brand- and it came back negative....took it apart to see the strip and I see a faint line! Pregnant or not? Was there not enough if he hormone level for the digital to pick up but the strip to pick it up?? I also took apart the one I took yesterday it was a bfn but the strip says bfp with two lines. Does this mean anything??