My spouse that left in crisis has this problem. The name of a town would trigger "a clue" as to why they should or not do something. It was like watching a spy movie. They were always looking for direction trying to second guess everyone before they even did anything. It is fear, paranoia. That is not so bad when you know what it is and are on medicine for it. The chest tightening up, I get anxiety attacks when in a shopping mall and then all of the sudden all these people swarming all over the place, I have to run outside of the building and get some fresh air. It also sounds like anxiety attacks. As for not being to do anything because of making too much noise, you are over focused on your surrounding around you rather than focusing on what you are doing. Try focusing more on just what you are doing at the moment and that should help alleviate the tensions you are feeling. Definetly talk to a professional who can give you the right medicines. It could be something as simple as a chemical inbalance in the brain. There is hope my friend, we can overcome phobias. Blessings...