I'm having pregnancy symptoms after I already had my period

So I had sex with my boyfriend during my ovulation period (didn't know at the time) we used the pullout method like always but this time he came in me a little bit. Like a week later i had my period (which was a whole week early and heavier) and I was experiencing pregnancy symptoms after it went off i was still experiencing symptoms but a lot worse. I took 3 pregnancy test which came out negative but still thinking i might be pregnant. So one day my mom text me and tells me that my grandma was dreaming of a tank of fish and my family really believes that if someone is dreaming of fish that someone in our family is pregnant. Could i be pregnant????