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You are most likely suffering form acute viral pharyngitis
with secondary bacterial infection.
Presence of whitish pathces along with red spot suggest the diagnosis.
You should consult with internal medicine specialist/ ENT surgeon and should go for thorough check up.
You should take appropriate antibiotics along with decongestants for faster recovery.
You should also perform gargle three times in day.
You should avoid yogurt, oily, sour and cold
Dr. Mayank Bhargava