Can i possibly get pregnant from precum??

So i was giving my boyfriend a hand- job the other night & he stopped me after the precum and put it back in his shorts. He went to finger me after & after he did it, i made a comment about it. He told me he used his other hand to put it back in his shorts & he as well licked his fingers before touching me. But i’m on my 3rd day of my placebo pill and haven’t started, this is the day i normally start. I’m terrified there’s a chance i could get pregnant. I’ve debated going and getting Plan B but i’m scared my mom will notice i’m $50 short.