could i be pregnant?

I was due for my period today, haven't really had any symptoms. 8 days after ovulation I had some cramping on my right side and my whole body hurt. I have been extremely tired and sleeping way more than I usually do, feeling nauseous and yesterday and the day before I had spotting only when I wiped and now I have no signs or symptoms like I usually do when I get my period. could I possibly had implantion bleeding 2 days ago and possibly be pregnant?