Puis-je retarder mes règles en toute sécurité sans effets secondaires ?

Considering that you had sex on the 7^{th} day of your menstrual cycle and took an oral emergency contraceptive, it is highly unlikely for one to be pregnant. Bleeding after taking an emergency contraceptive pill is normal; it occurs because your body reacts to the increased dosage of hormones in the tablet. Nevertheless, if you have any apprehensions or develop any weird symptoms seek a gynecologist for accurate diagnosis.

It is common to worry when your first sexual intercourse is not on time. It may be a bit late due to stress, weight gain hormonal imbalance, etc. If you think that you might be pregnant then do a pregnancy test to calm down yourself. Remember that every time one should use a condom during sex to avoid pregnancy and getting infections like HIV. 

You see­m to have an issue with your urinary area and private­ parts. The pain down there, ne­eding to pee all the­ time, feeling thirsty, and proble­ms with your vagina. Those are signs of infections like­ a bladder infection or a yeast infe­ction. For a bladder infection, doctors give antibiotics. And for a ye­ast infection, you need anti-fungal me­dicines. Drink lots of water. Wear cotton unde­rwear. That helps stop these­ infections from happening.

Feeling worried after unprotected sex is normal. Anxiety is common in this situation. Emergency contraceptives like the 'i-pill' are most effective within 72 hours. Side effects like nausea or dizziness may occur but usually pass quickly. If you're unsure, taking the pill can help prevent pregnancy.