It is not uncommon for pregnant women to experience lower abdominal and right side back pain during the second or third trimester. This discomfort can be caused by a variety of factors, including hormonal changes, weight gain, changes in posture, and the growing uterus putting pressure on surrounding muscles and ligaments. However, it is always important to consult with your healthcare provider to rule out any underlying conditions or complications. They may recommend exercises, stretches, or other methods to alleviate the pain. Additionally, maintaining good posture, using proper body mechanics when lifting objects, wearing supportive shoes, and using pillows for added support while sleeping can help reduce discomfort. If the pain becomes severe or is accompanied by other symptoms such as fever or vaginal bleeding, seek immediate medical attention as it could be a sign of a more serious issue.