The symptoms you’ve described are very subjective and nonspecific and cannot be considered as reliable signs of pregnancy. A lack of an expected menstrual period is the fist serious sign of pregnancy, although it does not always indicate pregnancy. Sometimes a missed period could indicate other medical conditions which should be checked by a gynecologist. The only secure sign of pregnancy is a positive pregnancy test. Blood pregnancy tests are more sensitive than urine-based tests. Blood tests can show positive results 5 days before an expected period date or 10 days after ovulation and possible conception. You can do a home pregnancy test if your period is late as the first step and follow up with your gynecologist.