'Anxiety' in the Bible

For I wrote to you out of great distress and with an anguished heart, and with many tears, not to cause you sorrow but to make you realize the [overflowing] love which I have especially for you.

His affection is greater than ever as he remembers the obedience [to his guidance] that all of you exhibited, and how you received him with the greatest respect.

Besides everything else, I have a daily burden because of my anxiety about all the churches.