It is not uncommon to experience some degree of lower abdominal pain during early pregnancy, including at 7 weeks. This can be caused by various factors such as the stretching of ligaments, hormonal changes, or even gas and constipation. However, if the pain is severe, persistent, accompanied by bleeding or other concerning symptoms, it is important to consult your healthcare provider for further evaluation. They will be able to assess your specific situation and provide appropriate guidance and care. In most cases, mild to moderate lower abdominal discomfort is considered normal during early pregnancy, but it's always better to err on the side of caution and seek professional advice when in doubt.