My breath gets short often and I suspect it has to do with my blood pressure. I got a BP monitor in August, recorded the results for a few days and sent it back (mistake). In that time my BP went as high as 130/73 and s low as 104/70 (measured at different times of the day).
The thing is that the shortness of breath can strike at different times of the day. Today I got it after lunch, accompanied by fatigue, difficulty concentrating and inability to finish a walk.
I use filtered water and add a pinch of salt to it. In the last blood test I did my sodium was 142 in 136-145.