This morning I woke up with the feeling that my lungs were too small.  I kept trying to breathe much more than I could.  I inhaled as much as I could, but it just did not seem to register. It was quite unpleasant.  And it continued through the workday. When I walked it was worse than when sitting, but not quite in proportion. So I suspected that it may not be the lungs actually.

When I came home, I measured my pulse while sitting, standing and doing light exercise on the magnetic bike.  My pulse was not particularly high and it varied normally with the workload. I would think it would have been much higher if I was actually lacking oxygen.

Now around midnight the feeling has changed to more bronchitis-like. I wonder if it really is all in my head. I don’t want to go to bed because I don’t feel sure I’ll wake up again. On the other hand, not sleeping is bad for your health. I guess the only way to find out is to let time do its thing.  If I write more entries after this one, it was presumably not fatal.

EDIT: It’s the next morning, and I’m still breathing. Not quite unexpected but still a cause for celebration, I think.