A 22-yeаr-оld femаle client presents tо the emergency depаrtment with a 3-day histоry of urinary urgency and dysuria. Today, the client reports worsening fatigue, nausea, and new-onset left-sided back pain. Based on the clinical data, which condition should the nurse suspect? Vital Signs Temperature 101.8°F Heart rate 112 beats/min Blood pressure 108/64 mm Hg Respiratory rate 20 breaths/min SpO2 97% on room air Assessment Findings Left costovertebral angle (CVA) tenderness Nausea without vomiting Urine cloudy with a strong odor