"If you remain concerned despite my reassurance, or if your sore throat and other symptoms continue, I would urge you to return to the GUM clinic. You could even print out this thread and take it along as a framework for discussion. But in the meantime, I would urge you to not be concerned about HIV. That's a very unlikely scenario here."
If the guy insists he's got HIV, what can the doctor do EXCEPT tell him to test..
You had the same trouble too..