hi
i don't think any of up can say what it is. i have been suffering with sore throat but mine is from coughingmy anxiety habit is coughing when i don't need to. when I'm bad then the next day it will be agony.
if you are due a follow up chase it up i had to chase up follow up for my boys ears they forget sometimes lol and tell them its their and ask them about cancer. i really doubt its cancer it could be anything chick you got to remember though that they are trained and would have spotted cancer and other things like that? the stuff he gave you could be what's making it aaggitated.
no doctor but you could try not using it for a few days pen if it dies down.