@camslam35, happy you came across this post too! But sorry that you have these symptoms. I assume the inflammation is due to acid reflux or something else? For me I've noticed that if I have reflux and I forgot to take the prilosec for a day, it will feel like there's a large weight on my chest. Definitely not a pleasant feeling but the medication does help.

The tests may come back normal for you, but it's possible that there may still be something there that the main tests won't pick up. I think there are a lot of tests that could reveal something, but those usually take time to figure out what you might test for.

Do you recall any specific event that may have led to the symptoms first developing, such as a weightlifting event or something else, or did it come about some other way?