Final answer:
The symptoms suggest a gastrointestinal infection, which requires further diagnostic tests for accurate identification of the causative agent.
Step-by-step explanation:
The symptoms described suggest that the 32-year-old Native American/Indigenous female patient is experiencing a gastrointestinal infection. The abdominal pain, nausea/vomiting, and chills, combined with the reported symptoms of nausea, diarrhea, vomiting lasting 24-48 hours, possible dehydration, and change in blood pressure and heart rate, are consistent with a gastrointestinal infection. This could be caused by various pathogens, such as bacteria, viruses, or parasites, and further diagnostic tests would be needed to determine the specific cause.