Can someone ease my mind?

I was already 2 days late into my period, but I decided to have protected sex with my boyfriend because i haven’t seen him in a few weeks. The condom broke and he came a little in me. He offered to pay for Plan B, but we split the cost because it wasn’t his fault and I knew it was pricey.

I took it two hours after sex.

I was feeling stress free until I was sitting on my bed by myself, unsure of when my period was coming or if i was already late and pregnant because of my already late period. My boyfriend and i never have unprotected sex, so I don’t think I should be pregnant, but I think I’m just super paranoid because this is a first for me and with an already late period that’s kind of troublesome.

Can someone share their experience? Help ease my worries a little bit? I’m not looking for super concrete answers because of course this is an app and not a doctor’s office, but it would be nice to have a little support.