Your throat and tonsillar fossa are congested and there may be a ulcer too... it might be bcoz of throat infection and may aggrevate by acidity... better to have an ent consultation but since u have started amoxclav - continue it for 7 days and still u dont get relieved.. you may need to get covid-19 tested
Next Steps
Salt water gargles 2-3 times/ day
Health Tips
Avoid spicy food, cool drinks, cool foods, eat hot and fresh