Will have to check your throat once and would also like to know other symptoms and complaints
You can take for 2 more days and complete the course of 1 week . However would also like to know how much relief you had with this. Moreover since you are having dry cough , it could be irritable cough which is triggered by reflux , allergy , post nasal drip as well.
Next Steps
A consultation would be advisable to guide you better