Time is a pure illusion that has been created by humans in order to control the human race as a whole; in essence time doesn't exist outside the perception of people. Once focused upon through contemplation time becomes more and more illusive to comprehend or even understand. What the reality of time actually consists of is merely in total the passing of a life; the time between birth and death. Or some similar measure of the passing of time as it is possible to contemplate as physically real, time is a product of the mind that impacts the physical realm.
All your worst fears have a potential way of coming true in time if you allow them to do so through giving them some level of attention and focus. It is the pure thought of these fears that gives them energy, gives them life, that can then bring them into your reality giving these fears legitimacy to survive. Fears can't exist without the focus and energy that is provided by giving credence to them, avoidance of thinking about specific fears or a change of focus onto a positive alternative is always the ideal solution.