My period is irregular but I had sex for the first time and I’m panicking

My cycle has always been all over the place but i had sex for the first time 2 weeks ago (unprotected but he didn’t cum inside) (TMI ik), but I’m just panicking and stressing myself out about because i DON’T want to be pregnant. It was the 3rd of August and i was not ovulating but according to my other app I was supposed to get my period on the 11th (i usually never get it on the day it’s supposed to anyways). I’ve been feeling slight cramps and have been breaking out which is normal for when I’m about to start. Am I overthinking it or should I take a pregnancy test now ):