Worry, anxiety, fear and depression interfere with the normal functioning of the heart, lungs, stomach and intestines. The reason is that these patterns of thought interfere with the harmonious of your subconscious mind.
When you physically and mentally disturbed, the best thing you can do is to let go, relax and still the wheels of your thought processes.
Speak to your subconscious mind. Tell it to take over in peace, harmony and divine order.
You will find that all the functions of your body will become normal again.
Be sure to speak to your subconscious mind with authority and conviction. It will respond by carrying out your command.
(Source: The power of your subconscious mind by Dr Joseph Murphy)