Hello. So After My Last Period My Boyfriend And I

Hello. So after my last period my boyfriend and I got sexual and stuck his penis in without a condom for not even a minute. Just to be safe I took Plan B even though I am on the pill. I don't take my pill at exactly the same time every night but within and hour or so. One night I couldn't take my pill until about 8 hours later than I normally do because I ran out and that's how long it took until I could get my next ones. Recently my boyfriend and I had sex twice with a condom and he came inside me in it and when he pulled out we checked for rips but everything looked intact. My breasts have been sore these past few days and I have 3 regular pills left before I start my period pills. What are the chances I'm going to get pregnant?