There are many reasons for dizziness, nausea and lack of energy in early pregnancy: 1. If the dizziness, nausea and lack of energy occur during head turning, with episodes of visual rotation, it is considered to be caused by benign paroxysmal positional vertigo, which can be treated by manual repositioning. 2. 3. If the dizziness, nausea and lack of energy are not heavy, it may be related to early pregnancy reaction, which is caused by physiological problems. Because of the hormonal changes in the body after pregnancy, it is easy to cause dizziness, nausea and weakness, especially when the patient smells a special smell, the dizziness and nausea symptoms will be aggravated.