Terrified, help!!

Tess • 20, artist, hipster, dreamer, adventurer

Okay so me and my boyfriend just had sex and when he came when he pulled out but noticed the condom fell off. There was no cum on the bed so we are confused. He said he swears he pulled out before he came but I’m terrified that he came in me!! Should i go ahead and get the plan B pill or what do i do?!