Implantation

I'm not expected my period until 8/31 I started bleeding this morning but only as I wipe. It's pinkish/red and more then what I thought "spotting" would be. I ovulated around 8/15-8/16. My periods never come early. I've taken 2 tests so far and both have came out negative. Could this be implantation bleeding or against all odds my period came early? TIA!!