I'm curious and a bit worried about something that's been happening to me recently. I've been dealing with GERD for about four years and have been on medication for it. But over the last three months, I've been experiencing some breathing issues and chest tightness while walking and talking. It's frustrating because I feel the need to take deep, relaxing breaths, but I can't seem to get a full breath or feel any relief from trying. Do you have any idea what might be causing this?