Hello Dear These symptoms also happen in situations when you are tensed about something, or some particular people like authority figures. So what need to be understood that  tensed feelings are increasing when meeting strangers, or known people or authority figure or it can be a thought of meeting people can cause anxiety. A face to face interaction is necessary to analyze your concerns. Meet a psychologist for better understanding and treatment forward.

what you mentioned are symptoms of some underlying problem. see a psychiatrist to find out the problem.