Five months of sneezing, congestion, and throat mucus suggest chronic rhinitis or sinusitis rather than a simple cold. For effective long-term management, daily generic nasal corticosteroid sprays (like fluticasone or mometasone) are the gold standard to reduce inflammation. Non-drowsy antihistamines (such as cetirizine or loratadine) can control sneezing, and daily saline nasal rinses will help clear mucus. Because your symptoms are persistent, I highly recommend seeing an ENT specialist or allergist. They can identify specific triggers and customise a safe, lasting treatment plan. Rest assured, these chronic symptoms are incredibly common and highly treatable.