Are you breathing? When people have or experience anxiety or stress, they tend to inhale sharply and then hold their breath (this explains a "gasp!" reflex when you have a minor accident). If repeated, this can cause stress on your heart, your body, and your mind." Check out the article here.
#RUBreathing? Check out the relationship between breath cycles and behavior: Alertness, anxiety and panic are linked to accelerated or erratic breathing, while relaxation and calm are associated with slow, controlled respiration. Thanks @Grace Bullock!