If this thing that happens to you is creating problems it would be good to be evaluated by a professional. However I also think that some people are just sensitive to over stimulation. Our modern life with a tv or music always on, people talking back and forth and over each other, etc. is an unfortunate reality. That doesn't make it normal and some people understandable just can't handle it.

When I'm at a party or big family get together I sort of wander off and go away out in the yard or even walk down the street a bit to calm down. I do it about once an hour for about 15 minutes. No one has never asked me about it so I don't think they even notice.