Should I take plan B?

My boyfriend and I had sex the first with a condom. After that, we laid with each other for about 20-30 minutes.

He didn't get back up to pee or anything and we were starting to have sex again. But we had no condoms left. He put it in for about 5 minutes altogether and then we stopped completely. He didn't ejaculate or was even close to it

But On that day, eve was showing 22% chance for pregnancy that day because it says im ovulating. Its been around 30 hours after unprotected sex.

I've been checking for mucus down there but no signs at all, seems like im completely dry down there. I'm on my last day of ovulation.

What are the chances for pregnancy? Is it worth taking Plan B?