There are two possibilities: one is nausea and vomiting caused by delayed menstruation and endocrine disorders; the other is nausea and vomiting caused by poor digestion and gastrointestinal nerve disorders. When this symptom occurs, you can take symptomatic treatment, you can take vitamin B6 or probiotic drugs to relieve the symptoms of nausea and vomiting. During this period also need to pay attention to relaxation, do not be too nervous, if too nervous, too much stress, will lead to nerve dysfunction, causing nausea and vomiting symptoms aggravated. During this period, you also need to try to eat a light diet, do not eat too greasy, poorly digested food and spicy stimulating food, otherwise it will also aggravate the symptoms of nausea and vomiting. If your period is delayed, you can drink brown sugar and ginger water in moderation to stimulate the shedding of the uterine lining, promote bleeding and facilitate the onset of menstruation.