Well, not sure. Let me caution you woman to woman to never get so drunk that you put yourself in risky situations. Drinking isn't worth it or your health! I would imagine, though, that he has no reason to lie. I'm sure he doesn't want you to get pregnant anymore than you want to get pregnant. I don't know him though. So, not really sure what to tell you on this one. Emergency contraceptive throws off your period for 2 to 3 months usually with irregular bleeding. And it is to be used very rarely. But it is your judgment call here if you think you need to go that route or not. good luck