It sounds like you're concerned about a missed period after unprotected sex and whether you should take a certain medicine.

If you have missed your period after unprotected sex, it is important to consider the possibility of pregnancy. Before taking any medication, you should:

• Take a pregnancy test to confirm whether you are pregnant or not.
• If the test is positive, consult a doctor to discuss your options and next steps.
• If the test is negative and your period does not start, or if you have other symptoms, see a doctor for further evaluation.

Avoid taking any medication without medical advice, as some medicines can affect pregnancy or your health. If you are referring to emergency contraception, it is most effective when taken as soon as possible after unprotected sex, ideally within 72 hours.

If you want advice about a specific medicine, please share its name or consult a doctor directly for personalized guidance.

For any urgent concerns, you can reach out to emergency services.