A little worried!!

I had sex with a guy a few weeks ago and we were very careful about everything and made sure to use a condom-- later on I checked and there were no holes in the condom. My periods currently late by 2 days and I can't help but feel stressed (I don't take any current bc right now because I was going to get my prescription in August). I'm also going through a lot of stress with internship recruitment/interviews going on. Do you guys think there's a high chance I may be pregnant or is it just a scare?