It is not possible to have a true menstrual period while pregnant, as menstruation occurs when the uterine lining sheds in preparation for a new cycle. However, some women may experience light bleeding or spotting during early pregnancy, which can be mistaken for a period. This is known as implantation bleeding and is usually lighter and shorter than a regular period. If you are experiencing menstrual-like pain during pregnancy, it could be due to various factors such as round ligament pain, gas and bloating, or Braxton Hicks contractions. It's always best to consult with your healthcare provider if you have any concerns or unusual symptoms during pregnancy.