I had an abortion on Dec 2 2010. I am twenty three years old and in good health. I have never had an abortion before, but I have always taken some form of birth control . Anti-biotics were supposedly the cause of my pregnancy . I bled for eight days, then three weeks later bled very lightly for four days. I then went to the doctor and started birth control pills . After starting my birth control I had sex with my husband, because my doctor said the birth control pills should be effective immediately. Pregnancy test says I m not pregnant when taken this morning. I am to the point with my birth control pills that my period should have started four days ago, but nothing. I m worried and I don t know what to do. Is this normal?