Kindly do salt water gargle ( 2 spoons of salt in a cup of luke warm water). As you have taken medications, you can try this: a half spoon of honey with half spoon of squeezed lemon every morning empty stomach.
Next Steps
if the cough with expectoration increases or have chest pain, consult a doctor
Health Tips
change in colour of phlegm to green or yellow
chest pain/throat pain, consult doctor immediately