Thanks for writing your query.
In addition to the antibiotic Cephalexin
, you should take antiallergy medicine like Fenofexadine
120 mg once a day along with decongestant like Pseudoephedrine
or Phenylepherine. You should also do steam inhalation as it will be beneficial. Medicines to be taken under medical supervision only.
Also get a throat swab culture as it will help to find the appropiate antibiotic suitable for your infection.
If the problem persists, get yourself examined by an ENT specialist
I hope this is helpful to you.