Your fever with chills, eye burning, throat congestion and a blocked nose for three days usually points to a viral upper respiratory infection. This is common and usually settles on its own, even at 62. Paracetamol like Dolo is a reasonable way to manage your fever and discomfort.
Next Steps
Keep taking fluids and rest. Steam inhalation can ease your nasal congestion and throat irritation. Most viral infections like this settle within 5 to 7 days. If your fever is still there after that, or gets higher, please see a general physician.
Health Tips
Go in sooner if you develop breathlessness, severe weakness, or the fever climbs much higher, since at your age these need prompt evaluation.