I ve been taking the birth control Mononessa for 21 days. I ve been bleeding for 21 days straight, albeit lightly for the last 7 days. I ve had some complications with them, such as nausea and the prolonged bleeding... but I m still capable to go about my regular tasks. I m taking a multivitamin rich in iron as well. My regular doctor knows all of this information and has told me to continue to take them. I keep forgetting to ask him this though: since I m having complications with these pills, are they still an effective form of birth control? Will they protect me if I have unprotected sex?