Your symptoms are likely caused by a viral upper respiratory infection (common cold) or allergies. For home remedies, try steam inhalation, drink plenty of warm fluids, and get adequate rest. As a precaution, wash your hands frequently and cover your sneeze to prevent spreading the infection. For treatment, over-the-counter antihistamines like Cetirizine can help stop the runny nose, while nasal decongestants relieve stuffiness. You may take Paracetamol if you develop a mild fever or body ache. If symptoms persist for over a week, please consult a doctor.