You should get tested for Lyme disease.
You know, I can't say for sure whether or not he tested for that too. It was a blood test at a lab, and they weren't particularly informative there.
I can't remember why, now, but it seems like I kind of ruled it out because of some symptoms I didn't have. But, Lyme would be another one that, because of my activities, would make sense.
Sorry, didn't mean to hijack the thread.