Calm down everyone. Take a deep breath. Now, exhale. Now, focus on what you want to do and your own time frame. Changing money big time is something you never think about until you have, relatively, all your money in the world to exchange for a foreign currency that you thought would be around the 2 for 1 ball park figure. At the moment it isn't but you can't do anything about it except maybe wait.
Five and a half years ago we came out to Australia and exchanged all of our money from the UK for $1.48. In 3 months time from now we will be returning to the UK. On paper I suppose we have lost money even with the fall in the value in the £ at the moment. But, do you know what? We don't care. We will get on with our lives, and hopefully, so will all of you.