I think your air hunger experience is just due to an anxiety issue.
You have symptoms of anxiety.
Although the specific manifestations of anxiety vary for each person, this chronic state of tension can affect major systems of the body (breathing, heart work, diameter of blood vessels, salivary gland secretion, need for urination, form and frequency of bowel movements, body sensations, sexual pleasure, can all be affected by the anxiety)
Your symptoms and your chronic tension (or excessive worrying about everyday life), can define your condition as generalized anxiety disorder.
Once more, you can complete your examinations at your GP office, by getting regular blood test and thyroid gland hormone status test (quick blood test, too), to exclude other possible problems.
My personal opinion is that you have an anxiety issue.
This can be easily solved by getting appropriate treatment, even without medication, just, by learning anxiety management techniques and skills to assess situations more realistically (cognitive therapy).
Best wishes!
Marija