I am on bc but missed a few the past month, and am also on a few medicines that I know alter the effectiveness of my pills. I had intercourse with my boyfriend on 9/21 and the condom broke but we didn't know til after. I took plan B about 30 hours later. I was due my period 9/25, and am now a week later. Ive experienced nausea, some breast soreness, headaches, mild cramping, and always tired. HELP