Hi ilashes!
I don't want to boor you too much here but I have heart disease including heart failure and I'm on advair diskus 500/50 for lung problems. Another friend of mine who's had 3 ablations due to tachycardia (fast heart rate) is also on advair. So if you do have a lung problem and your Dr. has prescribed this for you, it might help you breathe better. I also have GERD.
My suggestion with the breathing problem would be to get referred to a pulmonologist - who specializes in nothing but breathing. They can run tests called PFT's (Pulmonary Function Tests) to see what's happening inside your lungs.
Acid Reflux can cause some lung problems.
Acid Reflux can actually mimic heart disease.
Anyone who has had all the troubles that you've currently been through, could also develop anxiety. I've been there, too. Sometimes, you could be going through more than one thing at a time with your body.
I just had to jump in here and try and give you a few answers, ilashes, and wish you the very best!!
Let me know how you're doing!
Hugs, Teri