HI, thanks for using healthcare magic
In adults,
oral thrush is more common if the immune system is impaired in some way, for example
diabetes.
It would be important to make sure that your blood sugar levels are controlled, this would affect your response to treatment.
If the medication used for the thrush was not effective, you may need to try another option.
In terms of the lesion on your
tonsil, the fact that there is no history of
smoking and limited alcohol use, reduces the risk that it is cancerous. When you are seen at the hospital and the area is further examined and biopsied, the doctors would be able to make a definite diagnosis.
It is understandable to be concerned but your risk is low. If, despite this, it is confirmed as a dangerous lesion, then early treatment would be helpful.
I hope this helps