Period cramps but no period?

Ami

I was expecting my period 10/6/17 but it never came. I’ve been having period like cramps and I’ve been waiting for it to flow but it doesn’t. I had unprotected sex and he didn’t nut but I know there’s still a possibility. I waited 2 weeks then took the test. It came out negative but then my period never showed. Is there a possibility I’m pregnant?