Hi thanks for your question.
,difficulty in swallowing and fever
.All these are symptoms of pharyngitis
that is infection of throat.It is usually allergic with superadded bacterail infection.The treatment you have taken is right but consultation with an ENT specialist
is advisible, who may be able to examine you to determine exact cause of pharyngitis.He may take throat swab for culture sensitivity and may change the antibiotic or may add anther antibiotic.
Hope this answers your question.