HELP ASAP

the incident occured on day 14 of her cycle, which is in between 28-30 days long. 2 hours after the incident, i got her the morning after pill, next choice one step (aka plan b). ive beeen reading and resarching a whole lot saying that the pill has been studied to show that it does not stop implantation. ive also read that the pill seems to have no effect if taken post ovulation, and that there are no studies to confirm that it prevents fertilization of an egg by changing cervical mucus. if a doctor or anybody could share some insight, please help. we are extremely scared and very worried.