A normal menstrual flow means that you are not pregnant. The first sign of pregnancy is the absence of normal menstrual flow, which occurs around six weeks after menopause. Some women may also experience early pregnancy reactions, which can be various, including nausea, vomiting, drowsiness, and weakness. However, we should not judge that we are pregnant just because we have early pregnancy reactions. The easiest way is to buy an early pregnancy test and do a morning urine test at home. If two red bars appear on the test, it means you are pregnant. If you want to be sure if you are pregnant, you can also go to the hospital to have a blood test for HCG, because HCG tests are more accurate than the morning test. A positive urine and blood test can only prove that you are pregnant, but if you want to be sure if it is an intrauterine pregnancy, you will also need an ultrasound test. An ultrasound can usually be done at 6-7 weeks of pregnancy to determine if the pregnancy is intrauterine and to rule out ectopic pregnancy.