Cramping when period would of been

Hayley • Engaged to the man of my dreams 4 years ttc mmc angel at 2 year mark bfp 13th feb baby #1 due oct 2015
So I'm just about 8 weeks and have lil cramps bit more than the stretching feeling I've had since I found out 
I'm just curious could it be because If I wasn't preg I'd be on my af day two I think I had them yesterday to