Worry fear and being scared is often routed in the past or the future. Most often the worst a moment right now can be, is unpleasant.
Worry and grief often comes from the past, from something that already happened.Fear and anxiety on the other hand comes from thoughts about the future. As the future is never present it is only the thoughts that create the anxiety. The thoughts are created by your mind. Therefor you can change the thoughts and the fear that comes with it.
Being in the present moment and embracing what is right now is the best way to get rid of the bad feelings. Being truly present and living now is how to overcome fear and grief.
Take care my friend.