Review Question - QID 216477

A 62-year-old woman presents to the emergency room with epigastric pain, nausea, and vomiting that started a few hours ago. The symptoms improved temporarily but then worsened. She started to feel sick while outside gardening. When the symptoms returned she decided to present to the hospital. Her past medical history is significant for hypertension, hyperlipidemia, and type 2 diabetes mellitus. She has a 30-pack-year smoking history but quit 10 years ago. She has no past surgical history. On exam, her temperature is 37.1°C (98.8°F), blood pressure is 139/98 mmHg, pulse is 82/min, respirations are 16/min, and oxygen saturation is 98% on room air. Heart and lung exams are unremarkable. She is non tender to palpation in any quadrant of the abdomen and there is no rebound or guarding. Which of the following is the most appropriate next step in management?