First rule out the possibility of pregnancy, and then see if there is any physical stimulation recently. Is there anything in your heart that is too stressful? I feel depressed! Or taking drugs or something. Under normal circumstances, menstruation will be delayed for 3-7 days. If seven days have passed, please consult a gynecologist in time! If menstruation has been irregular. I suggest you do a systematic examination or take oral short-acting contraceptives! Regulate menstruation! Or consult Chinese medicine for conditioning!