Missed Period
Following implantation, the body begins producing human chorionic gonadotropin (hCG) that inhibits the production of eggs in the ovaries. [2] This prevents you from having new periods. By the time this happens, your pregnancy is usually about four weeks gone.
If you have irregular periods, missing a period may be misleading. For certainty, do a pregnancy test. This can be done by purchasing a home pregnancy kit. The hCG hormone is what this kit detects in the urine to determine if you are pregnant.
Fatigue and Dizziness
Fatigue is one of the most common early symptoms of pregnancy. [3] You may get tired easily, even when you have not done anything exerting. You may also feel dizzy or sleepy due to elevated progesterone levels.