Mine was really bad for quite some time (at least a year). I finally started gradually exposing myself to uncomfortable sounds...and I emphasize "GRADUALLY." It is helping and I am starting to tolerate noise better. When I do expose myself to noise, it's only for small amounts of time, and it's not really loud noise; that would be too much.

I've also heard from other people who said that they had this symptom for up to five years before it started to go away on its own. Hang in there.