I have no experience of this at all. Beyond the trite "it sounds like it could well be something psychosomatic / psychological at the root", I can offer you nothing.

Except my best wishes. Which every 'catter who responds will also offer, and hopefully that will be a small source of comfort in difficult times. The only thing I can add it is that everything you've shared so far says there is no physical cause, so there is equally no cause to fear that your voice will not, in time, return. If it is a psychological problem, then stressing & fretting will only inhibit improvement, so try to be relaxed about it. Accept that this is where you are now, and do your best to deal with the larger problems you've got right now. You might well find that working through stuff helps with the paresis.

Oh, and please keep us up to date with any positive progress, so that we can all cheer you on! ;-)

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