Hi,
From your explanation, it looks like a viral infection. As it is a viral infection it will resolve once the virus will complete its cycle in the human body.
As of now, you can start with supportive treatment to relieve the symptoms like:
-Gargle with a warm saline solution that is by mixing 1 teaspoon salt in a glass of water and warm it to make a lukewarm solution.
-Take a combination of decongestant like
Phenylephrine, mucolytic like Ambroxol and anti-allergic
Levocetirizine and another combination of
Acetaminophen and Ibuprofen.
-Take cough expectorant containing
Guaifenesin and cough suppressant containing
Dextromethorphan.
-Chew a Vitamin C pellet daily.
-Do steam inhalations.
-Avoid spicy and chilled foods.
-Sip on warm water throughout the day.
-Do warm compresses over the chest.
Hopefully, the symptoms will resolve within a week and if it worsens consult a General Physician and get evaluated.
Hope I have answered your query. Let me know if I can assist you further.