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Pain that is related to ectopic pregnancy would be continuous cramping severe pain
and it is associated with excessive vaginal bleeding
.The loss of blood would result in the dizziness
Pain is also associated with spontaneous abortion
which would be associated with abdominal pain
in addition to bleeding.This pain would also be progressive increasing in intensity and would be cramping in nature.
Pregnancy is associated with mild discomfort in the pelvis normally, if it is not severe, increasing in intensity or associated with bleeding then it is unlikely to be anything to be worried about.
Hope this helps and wishing you a healthy baby