Might Be Pregnant Freaking Out

So we just had unprotected sex on Sunday. He didn't cum but he had masturbated a couple times the night before. We just got caught up in the moment but this is the third time we've been careless. We're engaged and getting married next year so it wouldn't be the worst thing just wasn't what we had planned. My mom calls me today and tells me she dreamt that my late grandmother came to her and told her she had dreamt of fish and that someone was pregnant. If you're unfamiliar with the significance of fish dreams, they denote pregnancy and so far they've not let us down when it comes to finding out someone in the fam is pregnant. I'm worried that I'm the one this time. I remembered yesterday that I was starting ovulation today and that an egg can be fertilized up to 72 hours after unprotected sex. I could try getting the plan B but at this rate it likely wouldn't work anyway. I want a baby with my fiancé. I just wanted to do things the "right" way.