Am I pregnant???

I had sex about to weeks ago and we used a condom but he's an ass and took it off with out me knowing.  When I asked if he came inside me. He told me No but I'm not sure if I believe him......
My period is now two days late and I'm feeling these light cramps but my period still isn't showing up...... is this what it feels like when you get pregnant??? 
I have no clue what is going on.... Am I pregnant????