Hello
I suggest you visit a Periodontist or gum specialist to rule out the causes for your bad breath.
There are many causes for bad breath like gum disease, tooth decay, food lodgement, poor oral hygiene, tongue coatings, dry mouth and oral infections and non dental causes might be ENT infection, lung infections,
diabetes,
kidney failure,
liver failure, smoking, alcohol and diet lifestyles. It is rarely caused by GERD. So first find out what is the cause then you can take the treatment accordingly.
Next Steps
Consult a Periodontist or Gum specialist
Health Tips
Hydration and tongue cleaning: Continue good oral hygiene, including using a tongue scraper.
Diet and lifestyle: Avoid spicy, acidic, or fatty foods at night; elevate your head while sleeping.