What are the odds??

Okay so I think Im freaking out for no reason... but my boyfriend and I have had protected sex quite a few times this month. He ALWAYS pulls out and finishes OUTSIDE OF ME, inside the condom. However, the condom broke on us once about 2 weeks ago :( when it broke, he was nowhere near finishing, and he pulled out instantly as soon as he felt it break. My boyfriend is not worried at all, but I'm worrying myself to the point where I feel sick. I can't eat, or sleep, because I'm so afraid I'm pregnant. Do you guys think I'm okay?? Please give me some feedback.