Nothing structurally wrong with my voice box. Not even the swelling and problems you might expect from some other health issues I have. After making the inside of my throath numb and sticking a lamp down there, the doctor wanted to discuss rhetorics and speaking to large groups. I was too healthy for him to bother talking about much else.
That was the good news. The bad news was that he could see I am using my voice wrong, I am straining it. So yes, it was what I was hoping for, I can do something about it with training. How is that bad news? Did anybody check where I live? In most places out of the big cities the voice trainers are concerned with the speach problems of kids: learn to say R, stop lisping, don't drop syllables - that kind of thing. That's not my problem. I don't even have a bad speaking voice. It may get a bit sharp at times, and according to reports I sound angry when I get intense, but it's relatively pleasant. What I do is I am forcing it - up or down, or just generally forcing it.
So, now my quest is: to find a voice trainer who understands the problems of adults who strain their voice. Until then my family has - with a certain glee - promised to let me know when I raise my voice unnecessary. My son, happily, countered my annoyed "go get your stuff" with a loving caring "be careful with your voice, Mom." It's no bet what snaps first, my voice cords or my temper.