Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain it seems that you had a severe case of
strep throat leading to
sore throat and white sores that seems to be pus pockets and are seen commonly due to bacterial [Streptococcous] infection.
As you took the antibiotic just for 3 days there seems to be lingering of the infection that has got re activated again..
Nothing to worry as it will get resolved soon..
You can very much take
Azithromycin for 5 days as it is effective antibiotic for
throat infection.
Along with it you should also take anti inflammatory painkiller like
Ibuprofen to relieve inflammation and pain..
You should do warm saline gargles 3 to 4 times a day..
You should do steam inhalation and use a humidifier in your room..
Suck throat lozenges and sip warm water..
Avoid spicy and chilled foods..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.