Не все нерегулярные менструальные циклы вызваны одними и теми же факторами; они могут возникнуть в результате нарушений гормонального дисбаланса, эмоционального стресса, колебаний веса и некоторых медицинских заболеваний. Посещать

Taking 2 painkillers along with Unwanted 72 pills can increase the risk of side effects like stomach pain, nausea, or dizziness. It's important not to take too many painkillers in a year, as it can harm your liver and kidneys. Please consult a gynecologist for advice on emergency contraceptives and a general physician for painkiller usage. 

It's generally recommended to avoid alcohol or to consume it in moderation for those who are trying to conceive or are already pregnant. 
Even if its 5% alcohol beer in moderation and may not have a significant impact on fertility or pregnancy outcomes, it's important to know that every person and pregnancy is unique.

If you have missed the periods for 10 days but still the pregnancy test is negative, then, the possibility is that you are having a hormonal imbalance or may be some other issues. It needs in person evaluation to proper diagnosis and get the right treatment for you.
 

PCOD and thyroid medications can affect menstrual cycles. But if you are experiencing prolonged pain and bleeding, it is recommended that you visit a gynecologist.

Sperm can live­ inside a woman for a few days. It can fertilize­ an egg during this time. Are you fe­eling tired, sick to your stomach, or have sore­ breasts? These might be­ pregnancy signs. You may need a pre­gnancy test if your period is late. To avoid pre­gnancy, use protection like condoms or birth control pills.

Pregnancy symptoms normally do not appear until a few weeks after unprotected sex. Nevertheless, if you are experiencing some stress, you might want to take a pregnancy test around 3 weeks after the sex. 

Missed periods with spotting might be signs of pregnancy. Stress, weight fluctuations, hormonal imbalances, or medical conditions also affect the menstrual cycle..Visit to the doctor to evaluate exact cause and treatment

Puberty can start at different ages for different people and there is a wide range of what is considered normal. 
The ability to have children (reproductive maturity) usually occurs after the completion of puberty when the reproductive organs, such as the ovaries and testes, have fully developed. For most individuals, this occurs in their late teens or early twenties. However, it's important to remember that everyone's development timeline is different.

It's common for menstrual cycles to vary occasionally in length, and a delay of a few days is not a serious issue always. Norethisterone is usually prescribed to delay periods, but if you've taken the medicine and still haven't got periods then consult your doctor.