Your chances of getting pregnant in the current scenario are almost nil. Firstly, you had intercourse at the end of a period which is a relatively safe period even with irregular cycles. Secondly, you took the emergency pill which offers additional protection. Your next period may get delayed and you may see some withdrawal bleed after a couple of days in view of the hormonal
imbalance created by the emergency pill. Please see a specialist for help if you do not see a period even after three weeks after the intercourse. Hope this helps.