Thanks for the query.
The chance of pregnancy
is less. Because though you had intercourse around the time of ovulation as you used emergency contraceptive pill
within time it will possibly give protection.
The emergency pill can alter the menstrual cycle according to the period of menstrual cycle when you took the pill.
As you took the pill in the second half of your cycle it might have postponed your periods.
For more details:http://srsree.blogspot.in/2012/08/emergency-contraceptive-pill-short-term.html
So you wait for one more week possibly by that time you will get the periods. If not go for pregnancy test once.