According to the 30-day menstrual cycle, the safe period is from the first day of menstruation 1 to 8 days, 9 days to 19 days, and 20 days to 30 days (I think experts at the Central 2 Healthy Road say there will be absolutely no problems, so the first seven and the last eight should not be taken lightly), that is, the dangerous period is August 1 to/kloc-.
Emergency contraception should be taken within 72 hours after ML. The instructions explain how to take it. It belongs to hormone drugs and has an impact on the body. I will menstruate 3 to 10 days after eating. I also had some dizziness, because I changed my period once, and I can't count the day before next month.
However, it doesn't matter if people have different constitutions. After you are pregnant with BB, it is better to eat once than to fight once.
However, this medicine can only be used for first aid, 1 year no more than twice, that is, it can only be taken once every six months. Never use it casually in the future, it will disturb the hormone level of the body itself, not only menstrual disorder, but also affect the function of ovary and uterus.
Look, you are nervous and care about your girlfriend. If you are together often, you can take long-acting contraceptives, which is harmless and safe. If you are only together occasionally, use TT.
I hope you are satisfied with my answer.