A 29-year-old client is admitted for a hysterectomy. She has repeatedly told the nurses that she is worried about having this surgery, has not slept well lately, and is afraid that her husband will not find her desirable after the surgery. Shortly into the preoperative teaching, she complains of a tightness in her chest, a feeling of suffocation, lightheadedness, and tingling in her hands. Her respirations are rapid and deep. Assessment reveals that the client is: