According to Google:

Anxiety is a normal and often healthy emotion. However, when a person regularly feels disproportionate levels of anxiety, it might become a medical disorder. Anxiety disorders form a category of mental health diagnoses that lead to excessive nervousness, fear, apprehension, and worry.

We can't really rely on ourselves all the time.
Sometimes we need some help.
Sometimes we need some advises.
Sometimes we need some rest.
Sometimes we need some humility in ourselves that making us too much proud of ourselves that we can do anything, that we can solve every problem, would lead to serious problems.

Because of too much of knowledge of anything and everything we often times overlook what's there in front of us.
Even the most basic and important part of our lives, oftentimes we miss.