Delayed menstruation if not more than 7 days, abdominal pain, breast swelling, may also be the impending menstruation belongs to the premenstrual syndrome, after the menstruation of abdominal pain, breast swelling phenomenon will disappear. Delayed menstruation breast swelling may also be due to pregnancy, in the early stages of pregnancy by estrogen, progesterone, can cause breast ducts hyperplasia, breast enlargement and swelling. A pregnancy test must be taken with a pregnancy stick, if the result is positive it means that you are pregnant. You should go to the hospital to have blood drawn to test blood hcg and progesterone, and have the baby kept on birth control if necessary. In the early stages of pregnancy, the development of the fetus is very unstable, it is necessary to pay attention to rest and avoid exertion, and at the same time, pelvic ultrasound examination should be carried out to prevent the existence of ectopic pregnancy. If you are not pregnant, you should consider that your period is coming soon, and you should pay attention to rest, strengthen nutrition, and not do strenuous exercise. Appropriate add clothing to avoid the body cold, otherwise in the menstrual period will appear dysmenorrhea phenomenon, affecting the normal work and life.