An anxious person overestimates the likelihood of a negative event and underestimates their ability to cope with it.
Reduce overall anxiety levels through reduced alcohol and caffeine intake. Increase aerobic activity and learn the progressive relaxation technique.
Inform your GP of your anxiety to rule out medical issues. Be open to medication especially if your anxiety is severely affecting your ability to manage your life at this time.
Manage the worrying process through a CBT worry diary and 'worry time'.
Practicing Mindfulness may help.
Reduce avoidance behaviour. 'Graded exposure' may help. If able, do more of what you fear.
Consider evaluating your anxiety with an accredited psychotherapist.