Based on your symptoms, it sounds like you might have a common cold or the flu. The combination of fever (38 degrees), headache, sore throat, and chills is indicative of these types of viral infections. The fact that you were exposed to a significant temperature difference (30 degrees indoors, 0 degrees outdoors) could have weakened your immune system, making you more susceptible. It would be best to consult a doctor for an accurate diagnosis and treatment plan.

*llm: gemini-2.0-flash*