So often when we are faced with adversity we look at the event from a negative perspective. Why is this happening, what is going to happen now, what if this happens, I am a good person so why me? Don't panic, these negative thoughts are natural and is your brain's way of preparing for the worst stemming back to the beginning of time - linked to our freeze, fight or flee self-preservation mechanism. These are just thoughts and thoughts are easily changed because YOU control them.
When you next have a negative thought, replace it with a positive one. "This is exciting, I am going to step up to this challenge, I am going to tackle this head-on" are all ways to replace negative thoughts.