There is more than just one emergency contraceptive. Here is a list of those that may be of an option to you since accidents to happen. The information shows its successful percentage as well as what the steps are in obtain an emergency contraceptive.
The Effects of Hormonal Birth Control on Your Body
The Ultimate Guide to Safer Sex - another fantastic infographic! Though I am surprised that the IUD is not listed as a birth control option. It is the MOST effective form of birth control besides abstinence.