Period is late and I'm freaking out

My period is 4 days late, which is not really common for me. I have had basically no simptoms either. Like maybe a couple of lower belly period aches, a bit of chest ache and emotional turmoil but everything much less then I normally would.

I am sexually active with my cis boyfriend but we don't have PIV (or PIA for that matter). I don't think I should be worried about a pregnancy but I am afraid somehow something might have gotten in by accident. I'm thinking maybe while he was grinding on my ass or if it went on the bed and I sat on it (😭).

I guess that's a combination of extremely poor sexual education and paranoia.

Also Idk if that's relevant but I've just started the gym two weeks ago. That's the only thing I can think it's different. I'm not under a particular amount of stress, at least that I feel aware of. Im graduating in a couple of weeks but I feel pretty chill abt it. Idk.

Any advice or raccomandation of what I should do are welcome.