When feeling anxious about some future outcome, try acknowledging this - "I don't know. I will know. But right now, I don't know." And that should bring you back to the present moment. Because indeed we do not know what the future holds for us. Maybe it will be better than we thought.
Source: UMass Faculty's video on The Role of Mindfulness in Stressful Situations - Carolyn West, PhD, Faculty as UMASS Medical School, Centre for Mindfulness.