Okay,I have been
on birth control for 4 years now. My last menstral cycle started
on July 3, 2013, then I started by birth control like normal on July 7, 2013. But my doctor put me on antibiotics which I took July 9-16, and when I googled the type of antibiotic it said it could make my birth control ineffective. Birth control is the only thing I use for protection against pregnancy.