Breast pain after half a month of coitus and then no pain, may be a sign of pregnancy, but can not be sure. If you don’t take proper precautions when you have sex, and you have a slight pain in your breasts afterwards, it is more likely that you are pregnant, because the hormone changes during pregnancy may cause your breasts to increase in size, swelling and pain in your breasts, breast spillage, darkening of the areola, etc. With the growth of the pregnancy cycle, the reaction to the pregnancy may gradually disappear or be reduced, and so the symptoms of slight pain in the breasts will be alleviated. However, it is not possible to accurately determine whether a woman is pregnant based solely on the fact that her breasts are slightly sore for half a month after intercourse, and then they are not sore again. If you are pregnant, you may also experience nausea, vomiting, loss of appetite, menopause and other symptoms, so breast pain after half a month of intercourse is not necessarily due to pregnancy. If you’re worried that your breasts are not hurting after half a month of intercourse, you can use test strips or choose to go to the hospital for an ultrasound, and then analyze the results of the diagnosis to determine if you’re pregnant or not. If it is an unwanted pregnancy and you don’t want to have a baby, you should have an abortion under the guidance of your doctor.