You did sex close to ovulation time and condom has failure rate near about 15%. Diane
is a combined OCP
and it takes time to prevent conception. So, in this case, you do not get full protection. Emergency contraceptive pill
within first 72 hrs is the best choice.
Here, you need to wait for next coming period and if it is delayed more than 7 days, one home pregnancy
test is required to confirm. Good luck.