Hi, Thanks for using HCM.
Fertile period is between 10th day to 18th day in normal regular cycle of 28 day duration. As you had sex on 10th day and taken morning after pill, chances of conception are negligible.
Failure rate of morning after pill is 5%. Not completely effective in preventing conception.
Regular use of emergency pill is not recommended.
If You get delayed periods by a week or 2 get pregnancy
Hope this helps you.