I have a hacking almost 24 hours a day, shortness of breath, can t breath because I can t stop hacking. I ha double pneumonia 1 1/2 years ago, recently moved, got new doctor, he insisted i get pneumonia shot, also have chronic sinusitis, saw different doctor for that, it s gone, but now I can t et rid of the hacking, can hear a cracking when I breath, mucus is clear, but miserable because oxygen level is at 93, keep hacking, can you help?