AF no af???

I am 6 days late for AF. I though she was coming yesterday because I had 2 drops of blood on the toilet paper. I put a pad in no blood in that, no blood in the toilet bowl or on paper web I wipe since the first 2 drops. That was yesterday morning still nothing this morning?????? Anybody else have this happen, could I be pregnant I took a test a few days ago and it looked positive but it wasn't a strong line so I don't know if it was Evap.