This acid then goes up into esophagus and
causes heartburn. If some acid leaks into trachea, it may be aspirated into lungs - and this is the cause of short breath. All this is dangerous since it may permanently damage your esophagus or lungs.
Until then, a green tea, or so, may help, since it creates a thin film over gastric mucosa, and prevent acid to affect it. But this is so-so, it may work or not, and it is not a permanent solution.