No period😳

So I had sex for the first time with my ex boyfriend (lol) and it didn't last long because I started freaking out and I was like pls stop (not in a bad way but in a we are ex's way), so it's not like he was in me for a long time. But, I'm so worried because I haven't gotten my period and it's been 2 weeks and I have no clue when it last was before this. I'm not good at taking the pill and we didn't use a condom because it was so spontaneous and I'm worried about pre cum. HELP idk if I should be worried or if I'm being dramatic.