There is a song by a famous recording artist, Cheryl Crow, that is titled, "A Change (Would Do You Good)".  Aside from liking the catchy song, when I periodically hear it, I always gravitate to the title words.  A change can be planned, however, in a lot of cases change occurs rather unexpectedly.  Those with a flexible mindset are probably not as  taken aback from having to go through a change and then there are those that agonize over this issue.  I have always felt that a transition into something new, always came with excitement and the opportunity to learn.  I also saw some peers that became paralyzed at the thought of having to change and some even went deep into denial.  If given the opportunity, I say embrace the fact that you will learn something new and focus on the possibilities that come with that.  None of us ever stay the same.  As we age and the way we look changes along with the rest of us, including our mindset.  With age we become less tolerant of the things that have less importance.  If you are going to worry about something, don't let it be the fact that you are going to change.  If you are headed for a change or have been thinking about it, I am sure that it will "do you good" in the long run.