Thanks for the query..
It seems that you are suffering from upper respiratory tract
infection causing the symptoms of drainage down the throat, dry throat, temperature rise, headache etc.
The infection will however resolve once the virus will complete its cycle in human body..
As of now you can start with supportive treatment to relieve the symptoms like:
1. Gargle with a warm saline solution that is by mixing 1 teaspoon salt in a glass of water and warm it to make a luke warm solution..
2. Take a combination of decongestant like Phenylephrine
like Ambroxol and anti allergic levocetrizine and another combination of Acetaminophen
3. Do steam inhalations..
4. Avoid spicy and chilled foods..
5. Sip on warm water throughout the day..
Hopefully the symptoms will resolve within a week and if it worsen consult a General Physician and get evaluated..
Hope this helps..