Also unfortunately, the DR10 code has to remain on your licence for a total of eleven years from the date of conviction. This can be highly embarrassing, for example when trying to hire cars, using your licence as day to day ID or in HR departments. Its a constant reminder to you.
Have a go at an appeal if you still have the time and you feel you can prove it was genuine misjudgment, otherwise try to get on with life. Your 30th birthday will arrive a lot quicker than you think!