pregnant??

my boyfriend and I had sex for the first time sunday night, he didn’t wear a condom and i was stupid and forgot my pill for like a whole week. he definitely didn’t cum inside, but will his pre cum get me pregnant?? it was the last day of my fertile window... kinda freaking out & it’s kinda too late for plan b. i’m only 18 and he’s 19 & i’m seriously freaking out.