Why do I always have to cough up mucus after eating or drinking anything?

[Nathanicity]

I’m late 20s, male, 6ft 158 lbs. I’ve lost 20 pounds since January due to my issues.

This has been going on for a few months now. One doctor said I have postnasal drip due to the bad flu i had in December. I’ve taken Flonase, mucinex, and sudafed and don’t notice any difference in my need to cough up mucus after eating or drinking.

I’ve had trouble swallowing for a year and a half and have had an esophagram and an endoscopy recently which showed esophageal rings, gastritis, and gastric polyp. I don’t have a stricture. Doctor suspects Esophagitis. I’ve been taking Omeprazole for gastritis and acid reflux for a few years now. The doctor increased it to 40mg six months ago.

And starting a year ago I’ve been unable to sleep on my back without waking up choking on my saliva.

This is torture.