Under normal circumstances, it is normal for the menstrual cycle to be early or late, within a week. Stressful emotional life changes and work-life stress can have an impact on the menstrual cycle. You have ruled out pregnancy and have a delayed menstrual cycle with vomiting. Vomiting may be caused by pharyngitis or indigestion, so you need to pay more attention to your diet and eat lightly. If your menstrual cycle is delayed, first check the thickness of the endometrium. Normally, menstruation occurs when the endometrium reaches 1.0. Delayed menstrual cycle after ruling out pregnancy is considered to be irregular menstrual cycle.