It is normal to experience chest pains after pregnancy, but you cannot tell if you are pregnant by the symptoms of chest pains. If there is an endocrine disorder that causes delayed menstruation, chest pain may also occur. Chest pain can also occur if there is breast enlargement or lobular hyperplasia. If you want to determine if you are pregnant, you need to check with an early pregnancy test, which should be done after three days of delayed menstruation. If the early pregnancy test shows two bars and a strong positive result, this is a sign of pregnancy. You can also use a blood test for HCG. If the HCG value is outside the normal range, it also indicates pregnancy, which is a more accurate and scientifically based test.