What Is The Treatment For Asthma And Arm Pain?

I'm 15, 5'3 & I weigh approximately 104lbs. I have mild asthma but it's really only triggered during exercise. A lot of times I get this really bad pain that tends to shoot down my arm as well while just laying down. Occasionally I'll feel my heart start to race too. I've been tested for heart conditions & everything came back normal. But I also find that I have a hard time eating things & it makes me feel sick to my stomach. I can wake up after a good nights rest & still be completely exhausted. What does this mean?