Went to dr and he said it was stomach acid which had gotten into my throat and lungs.
I went through bouts of broncitis for about ten years. When I retired from the Air Force, I finally learned I had severe acid reflux and a hyatel hernia. My VA doctor told me to take generic prilosec every day.
Hope you feel better soon.
I have had GERD and a hiatal hernia for about 30 years. I did not have my prescribed Nexium so I was just taking OTC stuff. Got to looking at it after this little episode and it was about half my dosage. No wonder I had trouble.