A 19-year-old diabetic woman who is 22 weeks pregnant presents with an occipital headache, blurred vision, and edema to her hands and feet. Her blood pressure is 152/94 mm Hg, pulse rate is 108 beats/min, and respirations are 20 breaths/min. The patient is conscious and alert, and states that she is “retaining a lot of water.” Your MOST immediate concern should be: