So sorry to be disturbing here =(  but i've got questions i need to clear up.
i've unprotected sex for the first time with my girlfriend on the 24th of september (yesterday) and i did not came inside her! but i'm worried the pre-cum is there.

her last period was around 6th-9th sept which means 24th is about her ovulation date?

so she took postinor-2 after about 20hours of the incident. now i'm not sure whether it works : (

she hasn't experience any side effects yet so she's worried it does not work.

i'm so sorry to be a nuisance here but i really need help on this issue.

how do we know if it is effective on prevention now? what can i do now =(? wait?

What should i do?? =( thanks in advance to anybody who is willing to help out. i know i did something wrong! sorry!

p/s - she had the 2nd tablet after 12hours. what can i do more to be 100% sure she's not pregnant?