Fever coming again and again for 2 days despite medicines can be due to a viral infection, a resistant infection, or the cause is not yet properly identified. Take proper rest, drink plenty of fluids, eat light food, and regularly check your temperature to monitor any changes. Avoid taking antibiotics repeatedly and keep your routine simple to support recovery. If the fever is not settling or increasing, or is associated with weakness or other symptoms, consult a doctor for proper evaluation and tests.