Some advice!

First of all, I had unprotected(not completely unprotected, he put it in without a condom for only a little bit) sex on Friday. I have been taking birth control pills for one month. At the end of the month pack of pills there's 7 "reminder" pills, the white ones. Three days after I took my last reminder pill I had sex. So I took three regular pills, before having sex. I'm not completely sure how BC pills work quite yet. Honestly my minds just playing tricks on my and everytime I have sex I get scared I'm pregnant (I'm an overthinker and its worse because now I'm extremely nauseous!) What's the possiblity I'm even pregnant? He didn't cum in me, only put it in for a second after wiping it off. I'm good right? Thanks for the answers!