Q. A 32-year-old woman, gravida 2 para 1, at 32 weeks of gestation, presents to your clinic. She reports feeling lightheaded and dizzy, particularly when lying on her back. These symptoms seem to improve when she lies on her side. She has no history of hypertension or cardiovascular disease. Her pregnancy has been uncomplicated, and prenatal check-ups have been normal. Her temperature is 98.6°F (37°C), pulse is 82 beats per minute, blood pressure is 126/70 mmHg, and respiratory rate is 14 breaths per minute. However, when she lies down on her back for a few minutes, her blood pressure quickly decreases to 108/70 mmHg, and her pulse rate increases to 110 beats per minute. What is the best next step in her management?