Whether or not you’re pregnant can’t be determined simply by chest pain and increased leukorrhea. Before menstruation, progesterone is more vigorous, stimulating the expansion of the blood vessels in the breasts will be painful, accompanied by breast hyperplasia; due to changes in lifestyle habits, staying up late may cause chest pain. The hormone is more vigorous before menstruation, causing the vagina to shed more cells may exist in the amount of leukorrhea is more. There is no pregnancy can be about twelve days after intercourse, go to the drugstore to buy a pregnancy test to rule out the occurrence of pregnancy, not all of them will be pregnant, depending on the time of intercourse in the ovulation, sperm and egg have not been combined to determine whether there is a pregnancy, not simply through the performance of the judgement there will be an error.