If your period is over in three days, it is not advisable to have intercourse within three days of the end of the period, as it may lead to bleeding again and vaginitis, etc. It is recommended that you have intercourse three days after the end of the period, and contraception should be used according to the need. Women whose menstrual period ends in three days should not have intercourse within three days after the period has cleared, because the cervical opening is not completely closed when the period has just ended, and intercourse at this time may lead to the symptoms of uterine bleeding again, and may also lead to vaginitis, cervicitis, pelvic inflammatory disease and other diseases. It is recommended that women have intercourse three days after the end of menstruation, when the cervix is fully recovered and can have intercourse. It should be noted that the chances of success of safe period contraception are small, and women who do not have a birth plan should take good contraceptive measures to avoid unwanted pregnancy. You can have sex three days after the end of your period, but you should not have sex too early to avoid discomfort, and it is recommended that you take contraceptive measures according to your own needs. If you experience discomfort after intercourse, you should seek medical attention.