Cramping in the abdomen like menstrual cramps after running does not necessarily mean that you are pregnant. A characteristic symptom of pregnancy is menopause, which is the absence of menstruation for a long period of time past the time of menstruation. The main method of diagnosis is a urine test or a blood test for human chorionic gonadotropin. In the case of a urine test, the presence of two bars on the test strip indicates pregnancy, while in the case of a blood test for HCG, the test should exceed 5 IU/L to indicate pregnancy. Generally, you can take a blood test for HCG about 10 days after intercourse to determine if you are pregnant, or you can test for HCG in urine about 2 weeks after intercourse to determine if you are pregnant. Dizziness, fatigue, nausea, vomiting, chest distension and abdominal cramps may be symptoms of early pregnancy, but they are not specific. Therefore, the determination of pregnancy depends on the HCG test in blood or urine and the presence of a gestational sac on ultrasound of the uterine appendages.