Understanding New and Severe Abdominal Pain

Since you are having pain and a delay in your menses, it is possible that you have the dangerous problem of an ectopic pregnancy (tubal pregnancy)! You must be evaluated by a doctor and be tested for pregnancy immediately!

If you are not pregnant, it is also possible that your pain is coming from an ovarian cyst. Because a cyst in the ovary can create a shift in your hormone levels, it may affect the timing of your menses.