hello and welcome to HCM,
When you say sore throat
i am assuming that your throat pains especially when you swallow or speak and hope your voice change is better now.
There can be many causes of sore throat but the commonest would be a reflux problem which can be treated by a combination of anti reflux medication
and anti reflux therapy in consultation with your doctor. If this does not make it better then you may be advised to undergo upper GI endoscopy
to rule out any ominous problem.
If you have already taken two different antibiotics then rest assured it is not infection and i would advice you not to take any more.
You may however take a throat swab to rule out a resistant infection and get a directed therapy.
Meanwhile you can do a few things which can make you feel better:
1. Do not have oily or spicy food and do not lie down immediately after you have food.
2. Reduce your intake of caffeine
3. Do not scream or strain when you speak and practice vocal hygiene
4. Get an ENT consult to rule out any problem with the tonsils
take care and get well soon
Dr Sriram Nathan