Cramping but no period?

Stephany
Hey, so the past few days I've been cramping really bad but my Aunt Flo hasn't visited. My boyfriend and I have been pulling out ( which I know isn't the smartest thing to do) but because he has such a low sperm count we never worried about it. 
​My period is a few days late and I'm starting to get nervous. I'm only 21  and was wondering if cramping but no period is normal? Does anyone think I can be pregnant?