I'm on a regular 32 day cycle my period was expected on 11/26/2011 I had unprotected sex on 11/13/2011. My period was 6 days late on 12/3/2011 I got light bleeding when I wipe and not enough to fill a pad/tampon and it only lasted 2.5 days and my regular period is usually 5 days. Is this a chance of pregnancy or just a really light period?