what are the chances ???

So I had sex last night and my bf accidentally didn’t pull out in time. I’m on the pill but I forgot to take one last week(week one of the pill pack). I also didn’t take last nights pill until the morning after (end of week two in the pill pack). Although this is true I took plan b like 2 hours after we had sex. My cycle is a normal 28 days and the last one started on dec 25. Are the chances shoe high of me being pregnant?? And when’s the soonest I can take a pregnancy test? I’m freaking out