Hi everybody. I was very happy to stumble across this discussion because now I know I'm not the only one experiencing this. It looks to be at least a year since anyone responded on here but I'll give it a shot and hope you guys are still on this thread.

My SOB started about 2-3 months ago. It's about exactly as @tonyagregg and @gabrielm are describing. Some days worse than others but it's there all the time, everyday.
I find myself often reaching for a deep breath and getting no satisfaction. I then find myself looking for yawns constantly with no full relief or satisfaction. Then after maybe 3-7 attempts I get a satisfying deep breath that feels good. Of course this doesn't last long and I'll find myself searching for that next deep breath that doesn't fully materialize, cycle repeats. Very annoying, disappointing, it affects my well-being by bringing on anxiety and then the situation gets worse.
I am in good shape, 43 yrs old, eat healthy, I go for long bike rides, I can jog 3 miles at will. Exercise is not a problem but the same symptoms exist while exercising. It doesn't matter if I'm biking up a big hill or laying in bed trying to sleep at night.
Like @gabrielm, I don't feel like my life or my job is stressful. I have had GERD for many years but Prilolsec once a day keeps it in check. The only thing I'm allergic to is cat hair/dander. I get similar asthma symptoms but all I would need to do is leave the cat house and I'm better. I can't do that with the SOB I have now.
My Oxygen level is fine, normally around 98. Resting heartrate is normally around 70. Blood pressure mostly steady at 120/80.
The Dr has prescribed an Albuterol inhaler which doesn't help and Singular allergy medicine that also doesn't help. I'm going back soon for a pulmonary airway test were you blow into a tube and it measures airflow and other things. I believe this will rule out any asthma related things but I do not know where to go after this. I'm experiencing some anxiety since its on my mind often and also have been having trouble getting to sleep at night, sometimes I'm up for hours.
I'm wondering if it could be psychosomatic if there is actually nothing physically wrong. Has anyone made any progress on figuring out this mystery?

Thanks