hi, I have shortness of breath, a wheezing cough, and some flem. I do have asthma and i m taking ProAir HFA, and. Also I do have Symbicort, that I take once in morning and night. I have QVAR 80mcg, but was told not to take it while taking the Symbicort. Been walking in the mornings about 4 miles with little of the above symtoms, but when at rest the symtoms comes back fairly intense. Why????