Struggling to breathe

I've been experiencing losing my voice when I talk. I'm noticing it happens a lot after I eat, or when I'm in motion. Feels like when I talk , I can't breathe, so the words don't come out. Always feels like I am trying to catch my breath. I have pain in my upper back, left and right. I have a hiatal hernia. My last endoscopy I had a stomach polyp, because of years of acid burning. I'm scared I have barretts, now. Is anyone else experiencing this. I take deviant every morning. Doesn't seem to be working.

That's dexilant, my ph is on auto correct.