Hi welcome to HCM
I can unerstand your concern for 
tingling sensation in the throat despite taking 
Benadryl .
Dear after going thru your story I can suggest you  that you are suffering from severe 
throat infection .  The problem toubling you is your swollen  throat  which is giving you feeling of tingling and wierd feeling . 
With all that medication you are taking  , I suggest you to do  gargles  ,with warm salty water 2-3 times a day for 5 mimutes 
  . It  will help you  relieve your odd feeling by removing inflammation of your throat  and let you spit out toxins accumulated in your thraot and help clearing all troubles .And you will see  The WORMS OF YOUR DREAMS are no where  .
Take 
Vitamin C   1 tab per day ordirected by your doctor.
Drink lot of warm water several times a day 
Light small meals   5-6 times a day .
Masala  tea made with basil leaves, cinammun , black pepper soothes the throat .
Avoid 
cold drinks ,ice creams , sour stingy things .
A thorough check up by  ENT is advisable to rule out  any other seious problem . 
Hope this helps solves your query .
Take care All the best 
 .