I wonder the same thing.... I am having similar issues. It is as if I try to get a deep breath, like every minute or so, and I have a hard time getting a deep good breath, sometimes I resort to yawning to get it. I had an ultrasound Mon. everything came back normal, now they want to do a HIDA scan tomm. to check the function of my gallbladder... I mentioned the hiatal hernia, but the nurse said most times with that someone will swallow food and have the feeling it is stuck in their throats or something... I don't have that, but she said you never know, and that might be the next step after this HIDA scan if it comes back ok.....
It is frustrating not knowing what is wrong with ya huh?? I have the breathing issue, bloating very badly in the upper ab area, under ribcage, etc. and no appetite. It is annoying..... hope you figure it all out, sounds like you could have a hernia, but really I am in the same boat, and have no real advise

sorry...