What about Fear of water? Phobias: xenophobia definition is a bit simplistic; yes 'strangers' but also more towards the fear of foreigners. Usually, used socially and culturally than just 'strangers' but I digress.
Worrying is carrying tomorrow's load with today's strength — carrying two days at once. It is moving into tomorrow ahead of time. Worrying does not empty tomorrow of its sorrow; it empties today of its strength. ("The Hiding Place")