Is it possible I could become pregnant after 1 missed pill this close to ovulation?

I have been on the pill for several years now. Normally I take it on time, all the time.

However, last Thursday (August 10) my boyfriend and I had sex. I took the pill that day, Friday, and Saturday. Now it is Monday, and I just realized I forgot to take Sunday's pill. The period calendar app on my phone says that starting yesterday (Sunday) through this coming Saturday, I'm fertile and on Friday I'll be ovulating. Knowing that sperm can live for up to 5 days, is it at all possible I could get pregnant because yesterday I forgot the pill? (I did take it today though, along with today's pill). It's been over 72 hours so I can't take the Plan B pill. I'm stressing out, especially because I won't get my period for another 18 days. Could I get pregnant and how soon can I take a pregnancy test?