Pregnancy Prank Jinx

So my boyfriend and I finally had sex but a couple days after, we began a prank war. He's always so paranoid about me being pregnant even before we had sex so my prank on him was that I had gotten pregnant. He was so happy and after a couple days I told him that it was a prank. Now, we are anxiously waiting for my period. As of today, it is 3 days late. Did I jinx myself? Its a horrible waiting game. Is there anyway I can induce it?