I recommend the book, Mercury Poisoning: the undiagnosed epidemic. It contains a number of stories about people who had unusual mercury poisonings.
The author is one. He worked at a steel mill decades ago when it was still legal to leave mercury switches in cars before melting the steel.
Another was a kid who found mercury and spilled it in the carpet in the back seat of the family car.
Yet another was a child who got sick due to mercury in the bedroom carpet. It could have been from a previous occupant of an appartment.
Btw, typical vacuum cleaners are thought to do more harm than good by kicking up the mercury and spreading it.
Trace Amounts movie is excellent on this topic. One of the major threads in the movie is the experience of one young man who ended up with suicidal Depression
and other debilitating symptoms after receiving just a mercury-containing tetanus shot! His former fiance is one of the more compelling people in the video. He got much improved with Cutler protocol detox. https://www.youtube.com/results?search_query=Trace+Amounts+movie
Again, I'm not saying this is your problem; however your symptoms suggest that at some point you look into the possibility. Remember old exposures won't show up on a mainstream insurance doctor's blood test!!!
Mercury won't likely show up in high amounts on a hair or urine test. Andy Cutler, PHD and Chris Shade, PhD chemistry discuss the challenges of diagnosing chronic heavy metal poisoning.
There are good detox support groups at Yahoo and Facebook but there is much controversy about which methods are safest and most effective. I chose Cutler's low doses in order to prioritize safety for my long-shot lead detox. I was very fortunate to have my health much improved as a result.