within 72 hours?

Sam • Just youre average socially anxious 18 year old!!

hi so I just had unprotected yesterday at 3pm and unfortunately we don't know if he came in me. I was riding and he suddenly pulled out and he goes oh there's cum on your butt. Now my question is, I get paid tomorrow, if I get plan b tomorrow is that within the 72 hours? don't criticize I'm asking for advice not anyone bashing me, we all make mistakes.