I agree with Ftm and Misstaylor. There is no absolute guarantee. In fact there are a few ladies on medhelp that got pregnant after taking Plan B and used it correctly. However, the closest you take it after you have unprotected sex then the more it will be effective.
It is definitely not a guarantee. The closer you take it to the time of unprotected sex, the better chance of it working. It made me sick when i took it, but it did work. Hope it works for you as well. Just take a test in a weeks time or so to see. Good luck!!
iv taken it as kong as you didnt throw up after you took it its a garantee!!
I took plan b after our condom broke and I'm now 28 week pregnant. I know the sooner you take it after unprotected sex the better your chances are of it working. I'm sure the pharmacist went over this with you but it really does mess with your cycle. Your period will be a week or two late. If its more than two take a pregnancy test. Good luck to you.