Wonder if you still do have a "smoldering" Lyme process going on. Or, possibly, a low level Lyme-associated infection that has hung around all this time (many who have Lyme, or are thought to, have co-infectioons of other tick-borne pathogens).

I'm not as expert on this as a number of other people who hang around some other areas of this board--but it might not be a bad idea to have a little discussion with wasabi or one of the other denizens at our subforum for that.