For 4 months I have been constantly coughing, gagging, choking, spitting up mucus and throwing up. I have been to 3 different doctors and each time they have treated me with allergy meds., cortizone shots, and diffent antibiotics to no avail.. I had a CAT scan of my sinus 2 weeks ago and the sinus is clear. They now have me scheduled for allergy testing coming in a week. I am into my 9th day of a 10 day antibiotic for the 4 time. Each time I feel a little better for about a week, and then the symptons return. This round of antibiotic I haven't had any relief. I am beginning to be very worried that this is much more serious than just allergies. Please advice.