My period hasn't come yet, and my lower abdomen is aching.

1, menstrual delay does not come, need to check urine pregnancy experiment, see whether pregnant. 2, if the menstrual cycle is normal at ordinary times, you can observe two or three months to see, if often menstrual delay, you can refer to the late menstrual conditioning, late menstrual cycle refers to menstrual cycle extension for more than seven days, or even 3 to 5 months a line, continuously showing more than three cycles, called late menstruation, mainly considering kidney deficiency, blood deficiency, blood cold, blood stasis, phlegm and other factors. 3. At this time, there is dull pain in the lower abdomen, which may be caused by pelvic congestion before menstruation. You also need to check B-ultrasound to rule out ectopic pregnancy.