I was in a chemical explosion (chlorine) about 18 mo ago. About a month later, I developed a drainage in my throat that won't stop. The dr has tried allegro and nexium and steriods to no avail. He took a MRI of my sinus and could see nothing abnormal. I go back again Jan 2. He has told me that a chemical burn was hard to heal, and that I just may have to live with this. Is this right?