Respected user , Hi
Thanks for using Healthcaremagic.com
I have evaluated your query thoroughly .
*  There are many conditions  apart from 
flu and strep giving 
tonsillitis .
*  Suggestions  for  better  recovery  
-  Continue antibiotics as per guidance by the doctor regularly .
-  Allow plenty of liquids orally preferable to give boiled water , coconut 
   water , green  tea , coffee , butter milk etc .
-  Soft , light diet at intervals .
-  Avoid all 
cold drinks , junk foods , chilled beverages , chocolates , cookies
-  Maintain hydration .
-  
Antipyretic  every 8 hourly even in absence of 
fever which works as 
   anti inflammatory .
-  Gargles  with  salted  lukewarm  water  added peppermint  oil  3  times 
   a  day .
Hope this clears your query .
Welcome for further guidance .
Thanks .
Regards dear .