If you had an ectopic pregnancy and ruptured your tube, you wouldn't be alive for very long....you would bleed much more internally than externally I would think as well.

You most likely wouldn't have normal "cramps" associated with a period. The fallopian tubes are located above your uterus. The best thing to do is preventative measures: chedule an appointment with the doctor when you do find out that you are pregnant and they will take care of you (an ultra sound will detect this.)