Gregory - You will likely talk to all 4 of your doctors to get a strait answer on this one.

The Pulmo Doc will say that diet is very important and eating the correct type of foods in SMALLER amounts goes along way in keeping a regular digestive process - especially at night.

The Gastro doc will say our damaged lungs must extend lower to increase breathing intake from the upper diaphragm area instead. Instead, this cause more pressure on the stomach and intestines just below. It's a Catch-22 easily seen on most X-rays.

The Dietician gal will reinforce the healthy eating guidelines (like no sugar or trans-fats), but implicate some of the medicines we may take to control our inflammation and mucus levels from day to day. Especially steroids.

Your Primary DOC will just send you back to one of the others depending on your complaints at that visit.
👉🏻😫👈🏻

IF they all mention that staying hydrated (esp. WATER 🚰) is the KEY to every clue mentioned above, you will know this problem is common and legitimate for US - and finally be on your way to a good management technique, indeed!
be Well

Breathing through your mouth can also add air into your belly and products like GasEx can help.

You have to watch your carbs, a lot of the pressed foods cause gas and bloating.
I have learned to eat smaller meals as a full belly pushes up on your diaphragm making harder to breathe. Breathe Ez.......