Kperry I've had the same feeling of not being able to get the deep breath 24/7. This air hunger consumed my life. But it gets better trust me. It started earlier this year were I couldn't get that fulfilling breath. Same with you blood work fine, chest x-ray fine, no doctor could find a reason. I was terrified dealing with this breathing problem every day all the time. Takes a toll on you. Then I remember reading posts on this thread and some people were talking about it being an ocd thing maybe related to anxiety or depression. Something mind/body not being in sync. So I basically convinced myself that I'm not dying from this and it was all in my head. I told myself there is nothing wrong with me, it's a mental thing. It was hard and took a long time but believe it or not eventually it went away. Of course I was amazed and feeling great for about six months or so this year but now occasionally it comes back. But it doesn't last long, I can deal with it and generally over a few days or so it gets better again. I can deal with that compared to how terrifying it was at the start. I know I'm going to be fine. Now, I'm not totally it's convinced it's all mental, in fact I notice the air hunger during times my body is worn down or just out of sync, maybe stress either physically or mentally emotionally. I think there is a physical relationship between my breathing and something like gerd and/or anxiety. Not sure. I also think emotional heart health and resilience could play a part. There's a lot of deep things in our minds we don't understand. But trust me it gets better. Hope this helps good luck.