Is there a possibility that I'm pregnant

Arielle • Engaged to my bestfriend. ❤️
So I'm on my 3rd week of the pill, Sunday I start the 4th week, but my boyfriend and I had sex earlier and he came inside of me, which I gave him the okay too before you freak out, but some of it dripped out when he pulled out so does that mean it didn't do its thing or what? & is the pill affective even though I'm only in the 3rd week row??