Mel,
I think mine started with an exposure to a new mattress. We got one of those foam type mattresses last May. It smelled funny, and it gave both my husband and I bad headaches, but we didn't think much of it - figured it would just air out, but about two weeks after sleeping on it, I got a fever, extreme joint pain, baaad headaches, my urine turned dark, and then I turned yellow all over. My liver functions were so bad, that my dr thought I had a block in the artery going into my liver. I had a liver ultrasound, and it was fine, but it was my liver being overwhelmed. My immune system was destroying my red blood cells so fast that my liver couldn't handle it.
So whether that was what it was or not, it was awfully coincidental. My dr says that extreme allergic reactions can throw your body out of whack, especially for those people who are sensitive to them. Now I try to steer clear of chemicals, including household cleaners.
I think you're on to something when you say your husband's implant might have provoked your husband's immune system.
Jill