If you have missed a menstrual period, and had unprotected sex prior to that, take a pregnancy test.  Although an ectopic pregnancy does not occur in the uterus, your body will present with many of the typical signs of pregnancy anyways. If you have an ectopic pregnancy, the pregnancy test would hypothetically always be positive. However, remember that these tests do have the possibility of false positive results or false negative tests, so if in doubt it is always a good idea to visit your doctor for a blood test for a confirmation. If you are pregnant, whether it has implanted in the uterus (as in normal pregnancy) or in the fallopian tubes or elsewhere (as in ectopic pregnancy), you will still likely experience some if not many of these common symptoms:  breast tenderness frequent urination nausea, with or without vomiting  absence of menstruation (as previously mentioned). If you have already confirmed your pregnancy or you still aren’t sure, but you experience abdominal pain, then it could be because of an ectopic pregnancy.  The pain mainly occurs due to the pressure exerted by the growing fetus on the surrounding tissue, which in the case of an ectopic pregnancy does not have enough room to accommodate the fetus (the fallopian tubes for instance, the most common site of ectopic pregnancy, are not by any means designed to accommodate a growing baby). The abdominal pain can be sharp and severe, or in some cases there may be no pain. The pain often increases on movement and straining, and is often localized to one side of the abdomen. Shoulder pain can also present due to the presence of blood in the abdomen, which can irritate the nerve that travels up to your shoulder. Know, however, that round ligament pain is very common in pregnancy. This pain, similarly, is located on one side or the other (or both) and can come in intervals (which usually last a few seconds each). The main difference is that round ligament pain tends to occur in the second trimester. The pain from an ectopic pregnancy will usually...

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