Could I get pregnant? HELPPPP‼️‼️‼️

So my period was already late by 2 days but I have an irregular cycle so I wasn’t really worried but I had unprotected sex yesterday and I still haven’t got my period should I be worried or is it unlikely for me to get pregnant??? I also took birth control like 30 minutes after we had sex so...

Edit: I took plan b after having unprotected sex and I didn’t get my period until 6 days later. Incase this helps anyone who’s going through the same thing. I’m so happy rn 🥺😭