Hi I can understand your concern... You are having a seasonal allergy to cold... If needed to search for cause of allergen allergic test done.... Allegra like antiinflammatory drug helpful for allergic infection.. If having blocked nose fluticasone or azelestine nasal spray can be used for shirt time.... In cold season you can use room humidifier .Hot water shower taken. Steam inhalation also useful for relieving congestion.... If dyspnea occurs then spirometry done to rule out asthma .... Drink more water.... Take care. You can consult pulmonologist for it.