Meaning that today, I went to the doctor. He diagnosed it as being overuse, not a more concerning thing like carpal tunnel, but advised that it could have easily developed into that at least on my right if I wasn't careful.
Which, of course, I now am supposed to be. Games are off-limits (though I'm not gonna give up mouse-only ones), I'm to take ibuprofen (much as I don't like it), and wear a brace during the night mainly with directions that during the day won't hurt but isn't necessary. So the plan is for me to use it for, say, eating, where some of the symptoms were showing.
I also have a new wireless mouse which is supposed to help, though I've had to adjust my grip of the laptop to compensate for its use. I tried typing with the brace on, but I can't manage that for long, which means that I'm probably going to have to cut back on my typing a little bit. Still gonna talk, though.
For instance, today I half-jokingly started a thread which said Santa Claus is God, which the thought randomly popped into my mind and I decided I might as well say. It's actually a surprisingly-strong connection though I admittedly had to make a few stretches in logic to make it work.