I've tried various things, but my phobia is not something that I think exposing myself to would work, I have cleithrophobia which is the fear of being trapped or confined. It isn't claustrophobia because I can quite happily sit in a closet all day long without any problems as long as I know I can get out. It often crops up in situations where I'm with a group at dinner and I'm on the back end of the bench and I'd have to ask 2 people to move so I could stand up. Or at concerts when there are hundreds of people around me, these kinds of situations. Or if I'm in a dentist chair or just can't move very much for awhile for some reason. How do I overcome this? I've tried and nothing has worked.