Am I pregnant

Okay so me and my boyfriend had sex and we used a condom but it broke. So he rushed to Walmart to get plan b and I took it about 30 mins later but what I hadn't realized was this was the first day of my ovulation and I know plan b is suppose to stop ovulation but if I already ovulated and the egg got fertilized will plan b stop it? I'm really scared? And I can't take a test for two weeks I believe so I need reassuring that I'm not pregnant anything will help. Thanks!