The absence of menstruation when it is due, accompanied by pain in the abdomen and increased leukorrhea, suggests pelvic inflammatory disease. If there is more pelvic fluid and increased leucorrhea, vaginitis combined with pelvic inflammatory disease is considered. You can take Gynecology, Gynecology Qianjin tablets and Hua Hong tablets for symptomatic treatment, which can be cured after a week of treatment. If you don’t have your period, you can see if the lining is thickened by ultrasound. If the lining is thickened, it indicates that you will have your period soon, and some people have stomach pain before they have their period. If you don’t have a period, you may be pregnant. If you take an early pregnancy test to determine whether you are pregnant or not, you must go to the hospital to have an ultrasound, and if you exclude pregnancy, most of you will consider pelvic inflammatory disease or stomach pain and increased leucorrhea when you are about to have your period.