Do you feel that way all the time?
I don't.
Crowds, noise, stress, and sometimes my thoughts, set me off, being put on the spot.
eg. My Doctor. "Nice weather today eh"
Me "yeah the sun is out, it's lovely"
Doctor "So how can I help you today?"
My brain "blgfxddhgxcxdjjujgsxxdhvshgcvhhcvjhch"...