This kind of cough are mostly allergic & due to irritation because of mucus plug in ur wind pipe , that is why it is More while talking ( ur vocal cords r near wind pipe ) & night & aggravated by eating sweets. As it is due to allergy not infection , antibiotics r not going to help u .
Next Steps
What u need is anti allergics & mucolytics syp
Health Tips
Avoid cold liquids, steam inhalation will help