Hello dear Understand your concern. Chance to become pregnant in period is very less but it may be possible in short cycle. I pill, is a single tablet containing 1.5 mg of synthetic progestin, Levonorgestrel. It is intended for the following uses: 1. Unplanned intercourse in couples that are steady or married; 2. Failed measures of contraception 3. In sexual abuse, rape or incest; For this emergency contraception to be effective, it is necessary to take one 1.5 mg pill of Levonorgestrel on a single day and within 72 hours of unprotected intercourse. Best results are seen when Unwanted 72 is taken quickly, within 72 hours of an event, as it takes 72 hours after fertilization for a woman’s body to produce a pregnancy. The level of protection provided by Unwanted 72 is as follows: If taken - within 24 hours – up to 95% effective - within 24 to 48 hours – 85% effective - within 48 to 72 hours – 58% effective If a woman should vomit after taking Unwanted 72, it is recommended to repeat the one time dose for effectiveness in pregnancy prevention under the direction of a healthcare provider. Please do pregnacy test if next period will not come Then do pregnancy test, if it is positive You can Use pregout abortion kit: it contain five tablet-Mifepristone 600 mg (One tablet) take orally. After 24 hr of oral tablet, put four tablet of misoprostol in to vagina. With in half an hour of punting tablet in to vagiana , bleeding will come out and that is conception product/embryo. Also note that: Following are the reason for late periods- 1. High level of stress 2. Change in life style 3. Late ovulation 4. Excessive exercise 5. Drugs: Birth control pills, tyroid medication, Excessive tea and caffeine 6. Thyroid problem 7. Hormonal imbalane: Menstruation required co ordinate action of various hormone that secreted by ovary (estrogen and progesterone) and brain (FSH and LH). If any above hormone is decreased or increased there is imbalance in menstruation. So please do full hormonal profile : Estrogen, progestron, LH, FSH, HCG and thyroid hormone. That help to diagnose hormonal imbalance. After confirmation you can take treatment according So please go ahead. Hope this may help you All the best. Stay healthy.