I Have recurrent throat infection that trigger fever ,Chills ,Phelgm and cough symptoms that started from 21 years ago, from that time ONWARDS it occured frequent with 2 or 3 month GAP , affected my school , college currently my day to day works , consulted several doctors at the time of infection and they prescribed medicine for the moment and it cured , but the same happened again and again , from child hood it occured as tonsillitis but later it will come as tonsillitis, pharyngitis, tonsillopharyngitis, Any ways to Accurately diagonise the cause of the issue ?