What Causes Shortness Of Breath?

I recently began having shortness of breathe upon any type of even the slightest cardiac output from working in the yard to running the vacuum over the last 2 weeks; I had a chest X-ray performed and upon the radiology report the only notation was Bilateral perihilarmperibronchial peribronchial predominat upper lobe infiltrates, Consider in differential granulomatousmdis disease or chronic less common airway disease; I've never had a report of such and I feel certain I've had a chest X-ray in the last year, which if chronic, should have been seen or notated then.
Case History in short; I've been on hemp dialysis 25 years this September, male 44 years of age, non smoker, with no other health issues other than the ESRF. I have always taken incredible care of myself and have earned my PhD in general medicine. I recently have gone thru a divorce from my wife of 12 years which was literally here and happy one day, and completely psychotic and stressed the next and last 18 months of my life, which unfortunately led me into a life which I was not accustom to, in that my diet is weak and poor as is my exercise, and now ability to even think of exercise. The physical rated at which I was exercising prior to all this was private training with the local professional soccer team, and playin level 5 tennis, all on a minimum of 4 days or 16 hours a week, I've never had any type of incapability to work out or work, although a HD patient the
Sat 24+ years; this divorce has really taken it out of me, but I am just now coming thru it, and ready to get back to it. I also have full custody of my 10 year old daughter, which she needs Dad to be close to 100%... This latest issue has really got me sidelined; I'd like to add, I just found out Friday my over all Fe/Iron levels are way down. Although I will not know the ferritn until Monday, my current total iron is down to 19, TIBC is 218, TSat is 9. I have a HGB of 13.0 currently which is a little low for me but hanging in there. I guess my query is what's this lung issue and is it something I should be looking into, or could it be simply a fluid issue, my medical training hasn't prepared me for anything such as this.