I feel your pain, worst feeling in the world...... breathlessness. I can't do anything, taking a shower is a major undertaking. However, I know what caused my problems....... 55 years of smoking cigarettes. I am 70 years old, and finally threw the darn things away three weeks ago, I have no desire to go back, but the damage is done, and it is devastating. I am starting pulmonary rehab. next week. Hoping for a miracle, I guess, but, maybe they can help me a little bit. Obviously, your problem is not the same as mine. But the end result is the same. Maybe you should see another doctor....... at least I know why I had to pay the price.