What can I try to deal with a chronic cough?

I have had a chronic cough for years. It hits me when there is a change in the atmosphere, smells, when I recline or when I laugh. I suffer from acid reflux and my doctor says there may be a allergy causing the problems in the spring and fall, but this is year around. I am really exhausted from this irritating cough and I am also embarrassed from coughing in public all the time. Sometimes it sound like a "old smokers cough" What can I try?