Not entirely sure how to put this in words, but over the past 4-5 years i've had random (about once every 2 months) minor breathing problems and chest pains (each separate attacks). When the breathing problems occurs, it causes me pain to breath in. Every breath i take it hurts to fill my lungs past 70% full and the only way i've found to get rid of this problem is to breath in as far as i can and shoulder the pain. After about 2-3 full breaths the pain completely disappears. Occasionally when this happens my left arm will hurt, its like a shooting pain down from my shoulder to hand. My shoulder will get a sharp pain in it (dead center of shoulder).
The chest pain i believe to be my heart. It feels like my heart is just vibrating really fast. Then with every breath it feels like my heart beats are off (so it feels at least).
As far as i know, there is no trigger for these episodes. Each episode can be on its own or with the other. I have a feeling it has something to do with my heart