ALL contraceptives, unless you have a total hysterectomy have a risk of pregnancy. The Pill (there are several out there) runs on average at 2% change of pregnancy. The condom has about a 2% risk as well. Combined you do NOT get 196% protection, you get only a slight increase of protection, nearly 1% increase of protection from pregnancy. Add spermicide and you might get a 0.5% reduced risk. What I am saying is that there is ALWAYS a risk of pregnancy with contraceptive (even tube ties and vasectomies are not 100% certain). http://www.rxlist.com/cgi/generic/norgestimest_ids.htm Gives one a good idea of effectiveness and chances based on their clinical studies with Ortho Tri-Cyclen / Ortho-Cyclen - the type you are taking. Note they have risk assessed under two categories "perfect use" and "typical use". the Numbers I gave above were with "theoretically perfect use". http://www.rxlist.com/cgi/generic/norgestimest_ad.htm Side effects and Warnings. Seriously if you are coming here to ask ANYTHING about your drug, your doctor failed to do his job and explain too you the the medication you are on, so I STRONGLY urge you to read that segment carefully and repeatedly until you understand what you are reading. Now IF your doctor had been doing his job he would have told you that Unprotected sex 10 days after start of your schedule would have you at a good level to have near (as perfect as the pill is) perfect protection from pregnancy. If he was a good doctor he would have pointed out that no two women are exactly the same and that the range of "safe" unprotected sex on the pill (contradictory as that is) is actually a range of time between 9 and 12 days - Most (not all) women get the benefits of The Pill at or on the tenth day. Some will continue to be very fertile and stand a high chance of pregnancy up to 20 days after starting the pill. It all boils down to how fertile you really are.