I am not normally this careless, so haven't really ever looked into this information. I did as much research as I could before asking, but I am getting seriously conflicting information and not really specific to my situation. My question is regarding the effectiveness of birth control. I am sure I am not the only one who has these questions, so for the sake of transparency, and more information out there for women, I am asking. I should note that I have been on birth control for over a year after taking a brief break, and three years before that (not sure if that is relevant). I started my 28 day YAZ pill pack a day late, due to a prescription issue. The pack was started on Wednesday, instead of Tuesday. I took the pill right away and then the Wednesday pill at my normal time. Early Friday morning, I engaged in unprotected sex (while I was a consenting participate, I can't say I used my best judgment given the information I knew.) I have read that in a 28 Day cycle ovulation doesn't begin until 7 days from the first day of your period. In this case, I technically would start on the 25th, however, if on birth control you don't ovulate, right? I was concerned with the lack of protection so Friday night, I got Plan B. This was taken within the 24-hour window, in addition to taking my birth control at the normal time. Given my pregnancy concerns, I was diligent in taking my pill through Saturday. Last night, however, I had a slip. I forgot to take Sunday night's pill. I took it as soon as I woke up this morning and will be taking my Monday pill at my normal time. I know all this craziness will decrease the effective rate and that sperm has the potential to stay within your body for up to 5 days. Should I take Plan B again? Also, going forward, if I were to have sex again this week, how should I even consider it? I assume using a condom would be ideal, but I want to know if there is anything else I should know. Thanks for taking the time to answer my question.