Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain
sore throat that does not subside with antibiotics and having obstructed feeling in throat can be due to either
Laryngopharyngeal reflux also known as Silent reflux or can be due to
acid reflux..
It can lead to sore throat and inflammation and swelling in throat can lead to feeling of obstruction in throat..
Phlegm formation or excessive mucous formation can also be due to acid reflux..
As you are taking antibiotics for long the white coating on tongue can be due to
fungal infection known as
Oral Thrush and it occurs when the good bacteria also gets damaged along with harmful one that is responsible for resisting infections in mouth and thus fungus proliferates..
I would suggest you to stop taking reckless intake of antibiotics and better consult a Gastro-enterologist and get evaluated and he can advise you investigations like
Endoscopy,barium swallow etc done to rule out the exact cause of sore throat and obstruction in throat and treatment can be planned accordingly..
As of now do warm saline gargles..
If there is white coating on tongue you can gargle with Nystatin mouthwash, suck
Clotrimazole lozenges and take plenty of yoghurt and garlic..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.