Since the age of 13, i have had these at least 5 minute heart pains that really hurt, there consistant too. I've been told to put your thumb in your mouth and blow, it worked for about two years, now at the age of 16, they are more painful and the thumb thing isn't working, and they are longer15 minutes, i have had several that lasted an hour, it feels like a wave of pain, every time you breath in. They are more frequent, and hurt from a scale 1 to 10, about 6. I am a hard working girl that lives on a farm, i play sports, ride, and feel rather in shape, but these heart pains actually occur when am not doing anything. The pain occur on the left side, and actually causes my heart to go faster. and a cut off of breath, any pointers?