Suffering from general flu, after running nose stopped i have throat irritation, feels like dry cough stuck inside, have problem sleeping at night?

Few days: It takes a few days for the flu to completely go away. Give it some time.

Typical: This is a very typical symptom of viral upper respiratory infections. I would stay well hydrated, suck on ice cubes if needed. Try using some honey in hot tea, chloraseptic losenges or spray. Use a humidifier in your bedroom at night. It should pass within 7-10 days.