I have problems with breathing, too. But for me I have found that if I do not eat anything solid after about 5 pm, and only liquid nutritional supplement by 6 pm - I don't have the problems with breathing. That allows the food to pass from the stomach before I go to bed.
If the stomach is full, I have problems with breathing and am very uncomfortable.
My 24 hr ph, etc test showed that each time I belched I refluxed. So getting rid of the food early helps get rid of that problem.
I take Nexium 40 mg in am, but was on 2x/day, but have dropped back to once a day.
I have tried to follow the above as much as possible as it makes a big difference. If I don't, I end up with vocal corRAB irritated and hacking cough for couple of hours in am, not to mention the breathing problems. So far it's worked. Modifying my eating habits beats taking another pill or surgery!