help?

hey guys i had like the best sex of my life yesterday but as this guy was hitting my cervix he decided to tell me he couldn't feel if he cums during sex and like tried to wank it out nothing happened so smart kid came in me. how fast do i need to take plan b because i just dropped an egg that day it's been about 24 hours i should be able to grab some before work tomorrow and yea kinda freaking out a bit...