I was diagnosed with lupus in 1997, which has since been in remission. I have always had extreme sensitivity to dust, smoke, smog, strong smells etc., etc, wherein particles seemed to get into my throat and mucus builds up in throat and I cough for I seem to be about to choke. Recently, I ingested a piece of plastic and subsequently, bronchoscopy was done, and findings were normal, the plastic wasn't in my lungs.