Welcome to HCM.Hoarseness
of voice occurs when larynx
gets inflamed called as laryngitis
. Your doctors have treated you appropriately. I suggest you get a laryngeal swab tested for culture and sensitivity. Maybe you are not responding to the antibiotics prescribed. Get new antibiotics prescribed from your doctor after the test.
Rest your throat as much as possible. Drink warm water for a week.
Hoarseness is also seen in a condition where there are small nodes formed on the vocal cords due to overuse of the cords. These are called as singers nodes.
Get yourself examined for this too. Thanks.