this makes more sense to me now, did not know that you lived by a coal burning power plant , they are one of the worst exposures of mercury next to amalgams and direct contact from liquid mercury, I do know that aircraft engine exhaust does contain many chemical byproducts as is in any burned fossile fuel either coal or jet fuel , what may be happening is that your system has been weakened by the power plant mercury exposure , as a result of that ,any other exposures from chemicals will affect you negatively, even going into a dentist office will make you feel worse, the same thing that is happening to bex , have you had ground water samples taken , I would be willing to bet that the soil contains high levels of mercury coming from the power plant smoke stacks settling into the soil and leaching into the ground water

another thing you may want to check out is that church steeple , 60 min last year did a story on cellular companies leasing chuch steeples in your part of the country to use as a cellular tower to increase there reception