I'm terrified that I might be pregnant

I had drunken sex about 2 weeks ago without knowing that I was ovulating. Apparently, the condom broke at some point, but he pulled out. I KNOW he pulled out. I was supposed to have started my period on Thursday, but now it's Sunday and I still haven't gotten my flow. I'm only 18, I don't want a child yet! Could I be pregnant if the condom broke but he didn't finish inside me?