I just recently started birth control (Minastrin 24 FE to be exact). I started on February 10 and have been taking it every single day at the same time though one day I took it about 15mins later than usual. On sunday march 1, I had serve diarrhea which I didn't realize would affect the pill. The next day, I had sex maybe an hour or so after taking my pill and the condom broke. I didn't take plan B because I didn't think about the diarrhea affecting anything but now I am concerned.