Pregnant curiosity

Hey ladies I’m very scared because i recently had sex about 2 weeks ago on April 14 but i was on my period I had just started that day. And I usually get my period every two weeks. The guy says he didn’t finish in me but he also said he wasn’t sure I have been feeling really scared. I started spotting yesterday and I thought it was my period but it’s not my glow says I won’t get it until may 1st I need advice ladies I don’t know if I’m just being extra and I should calm down or if I should be worried about being pregnant. Mind you i am at a very young age and totally not ready to be a mother