Controlling your emotions is a skill. It takes time to develop a perspective that identifies the feeling of stress as temporary, and mitigates the negative hormonal responses.
Understanding others is also a skill. Emotional intelligence is often overlooked as a necessary characteristic of functional people. Being tolerable and patient is something not everyone has the ability to demonstrate.
Develop mastery over your emotional responses by exposing yourself to the thoughts and examples of those who presently have control. Once you know it is possible, learn what you can do to make progress on your own and rid stress, anxiety and apprehension from your life.