Hi sir , in my opinion all your symptoms of persisting
sore throat, mild cough, chest pain is suggestive gastritis or
acid reflux.
Ifvi were your treating doctor.
I would advise you to stop drinking first, then prescribe anti reflux drugs for 4 weeks and see how you respond.
U can continue all other medications.
Regarding
throat cancer, sore throat, difficulty in swallowing, painful swallowing, change of voice, breathing difficulties, sudden
weight loss, neck swelling all these are suggestive of cancer.
Patient cant detect cancer, it has to be clinically evalueted by doctor.