An introduction to early pregnancy symptoms 1. Physical symptoms In the early stages of pregnancy, your body will undergo significant changes. You may feel very tired and weak, and some may feel headache or dizziness. Gastrointestinal symptoms are also very common, including nausea and vomiting, loss of appetite, and indigestion. Breasts may experience uncomfortable symptoms such as swelling and pain, and some may be accompanied by nipple sensitivity or pain. Frequent urination is also one of the common early pregnancy symptoms because the fetus\’ bladder presses on the woman\’s bladder. 2. Emotional symptoms