unwanted 72 after 24 hrs ,and my periods have delayed

Hi,
Welcome to ehealthforum,
The vaginal pain and abdominal discomfort that you describe could be due to the intercourse itself or infective cause. If the emergency contraceptive was taken within 24-48 hours of unprotected intercourse, it should help in preventing pregnancy (provided you were not sexually active without protection after taking it). Since the emergency contraceptives contain high dosages of hormones, these can cause period pattern abnormalities and delayed periods. Wait and watch for your periods which could be delayed due to the emergency contraceptive use. To arrive at your next expected period date, count the usual menstrual cycle length starting with first day of your withdrawal bleed. Visit your doctor/gynecologist for further evaluation if periods do not start within 10 days of expected period date, or if you suspect chances of pregnancy, or if you develop any other new symptoms. If pregnancy gets ruled out, and if you are not ready for pregnancy, but intend to remain sexually active, you should consider visiting your gynecologist to get started on suitable regular birth control measures to be protected (after your periods). Be regular with birth control use as instructed. Avoid having unprotected sexual contact if you are not ready for pregnancy.
Take care.