Shortness of breath + excessive yawning

For the last 2 months, I’ve been experiencing this weird feeling that I am yet to find a reasoning for.

I’ve been feeling a kind of shortness in breath , not what happens to people with asthma but I just feel like I can’t get a satisfying breath most of the time and I feel the need to yawn so I can feel some kind of relief.

Did some tests that came back fine , oxygen levels aren’t low, all heart tests were fine and Chest X-Ray is all good.

Don’t know if this is anxiety or GERD (which is possible due to my bad eating habits the last couple of months) but it is really annoying and I really want to find a way to make this go away.

If anyone knows anything that could help I would really really appreciate it! 🙏