Weird.

I was suppose to start my period yesterday (never late, if anything a day early) well yesterday I woke up. My first morning pee I wiped a small amount of dark colored blood. Then that was all the rest of the day now today no blood at all. I know I could be pregnant so I took a home pregnancy test but it was negative. My last two pregnancies I get a positive right after my first missed day. I'm just a little confused. Has this happened to anyone? If so what was the out come?