If you have completed the course of antibiotic and you do not have pain and fever
able to eat food then no need for further antibiotics.
you will be fine if the infection has gone, you must consult your ENT specialist
and get yourself examined.
You can take care of reflux of food contents in throat from stomach like if you have acidity in stomach then you are more prone for such reflux.
This reflux sometimes does not cause much problem but does makes throat sore.
You can take--
inhibitors for decresed acid production in stomach, before meals
gel half an hour before meals
Keep head end of bed elevated.
Avoid alcohol, Smoking
Do brisk walking daily
Go for walk after dinner
Avoid spicy food
Avoid late night coffee
follow up after 7 days