Morning after pills works very well and is most effective when used as soon as possible after unprotected sex. Your risk of becoming pregnant increases as time passes.
If you haven't started your period within 3 weeks after using emergency contraception, get a pregnancy test.
Breast tenderness, fatigue, headache, abdominal pain or dizziness are some of the side effects of morning after pills.
See doctor if side effects, such as headache, dizziness, or belly pain, continue for longer than 1 week.