Different emergency contraceptive pills have different percentage of effectiveness, all contraceptive pills and specially the ones you mentioned have a high effectiveness rate, which is around 80-89%. This doesn't mean that you have 11-20% of probability of being pregnant, it just means that from 10 women that should've gotten pregnant only 1 or 2 will become pregnant.
We cannot give you a number to assess your probability but I would bet a large amount of money on you not being pregnant.
I must advice you that emergency contraceptive pill should not be used as regular contraception
. Be sure you talk with your primary care
physician about the options you have for contraceptive care such as condoms, oral contraceptive pills
, transdermal patch
, injection contraceptives, intrauterine device
Dr. Fernando Batiz MD