Missed period

So, my period was about 2 days late so my boyfriend and I had sex for the first time in months because that usually makes it start. He used a condom and pulled out before he came but my period is twelve days late so far. I’m starting to get a little bit worried... is there any way anybody could reassure me in the comments or give me any sort of advice? I’m most likely not pregnant, right? I know I’m probably just paranoid but I’m getting worried.