Is it possible?

Hi ladies, so this is a little TMI but last night my boyfriend and I were having a little fun and his love stick was touching the surface of my vagina but never went in, he had no condom on and I saw when he came (cause it was in my mouth.. but that’s besides the point), should I be worried about falling pregnant, he says he didn’t come when it was near my vagina, only when i was blowing him but idk, should I be worried?