In Feb. I went from sinus infection to acute bronchitis and pneumonia. I was in the hospital for three days getting breathing treatments, IV's and antibiotics. My oxygen level was real low, blood pressure real high. I was terribly weak, actually sicker than I thought. You know, "it's a cold, it takes time to run it's course". At the hospital they called in a pulmonary doctor. It took me almost six weeks to feel normal. I was on oxygen and inhalers for a month at home. Don't mess around , orange gunk sounds like it could have blood in it. ER again!!