Fear

It's funny how we're really good at imaging a poor or bad outcome, but really bad at imagining a positive one. And I don't mean funny 'ha-ha'.

Fear, dread or working through all the worst ways a situation can play out has its roots in something healthy in our primal brain..Don't walk through the tall grass during the middle of the day (there may be a man-eater hiding) better to just stay in this tree..  But when these impulses cripple us and we can't see a reasonably probable situation playing out as it might normally, it's just our feelings having a field day over our intellect.

Whether or not you thrive on change, or are quite uncomfortable with it, it's best to acknowledge the role you are letting fear play in your own head.  And then decide if you want to cede that power over to a feeling or take power back. 

Now, let's go for a walk together through that grass.