Any chance of pregnancy? Help!

I had unprotected sex with my boyfriend a few months ago and we used the pull out method as we had ran out of condoms. Since then I have had regular periods each month and I took a test 2 weeks after we had sex which was negative. However now I’ve been feeling fatigued and dizzy and can feel a slow but hard heartbeat feeling in the right side of my stomach than you can feel when you touch it. I’m currently on my period though so could there be a chance of pregnancy or am I overthinking? Do any of you get that on your periods too? No hate just advice.