Help! Panicking

I just tired sex for the first time. We used a condom I think well and we pulled out before anything happened. We kept checking for holes or any thing that might’ve gone wrong and I didn’t think there was anything wrong. My period for about three months has been a couple days late but now it’s 7 days past when it was supposed to come. I’ve googled everything and it says I shouldn’t be worried but I need other opinions. I’ve also been exercising more and I’ve been stressed. I’m nervous and I don’t know what to do. Any advice?