I think I just realized what happened. Too bad I wasn't smart enough to have avoided it, but it's likely that I got some nasty backwash from a recently acquired estate pipe (or two) that I might not have cleaned out enough/properly.
This seems the likely cause of a case of tongue kill that I wouldn't wish on anyone.
I guess I'll call this new to me malady, and fergawdsakes never to be repeated please affliction, EPT.
as in in ept...Estate Pipe Tongue.
Today I'm cautiously enjoying far less tobacco than I would normally, and I'm only using my own cobs.
Things are a lot better, but still returning to normal. Lesson learned.