I was suppose to start my period today. i had spotting two weeks ago for four days. is it possible i'm pregnant?

Yes possible : having missed a period usually the first thing to do is check a pregnancy test. there may be other medical problems specifically like viral disease that can alter the course of your periods. In addition to a missed period, worrying about a missed period will further delay its return. I would recommend doing a pregnancy test or seek advice from your local OBGYN