possibly pregnant?

Anyways my boyfriend and I were in the mood and he was fingering me but I may have got cum on my finger and rubbed my vagina while he was doing it. I had skipped that week of birth control, due to a delay at a pharmacy. Obviously I'm not saying I am pregnant but there is a slight possibility. I was 10 days early for my period last month which was around December 10 maybe, but my Period is irregular anyways. So I'm hoping that I get it in a couple of days or I'm screwed. I also can't get pregnancy test, but this happened about 2 1/2 weeks ago. I haven't had any symptoms or anything but I'm just worried. Is there any way I could be possibly pregnant?

Any rude comments will be deleted.