Hi Cutie Pie. I definitly think you have some serious concerns to consider. I accidentally posted a concern I have in the parasite forum the other day. I'm going to go repost it here.
My daughter has the same symptoms(with the exception of the metallic taste) and she has no metal in her body. No fillings except plastic and never has. She got the numbness when she used the zapper on her feet. She kept using the zapper (not on the feet though) even though her throat got worse at first and it's gotten better. She only got the numbness the one time. I have her taking ornithine tablets now. I think she was killing too much at one time and that caused the problem.
I think that we all need to be careful when trying out these devices or even herbs and stuff. After all it's still medicine and doctors deal with patients haveing reactions to their drugs all the time.
I had the metalic taste in my mouth too. It never occured to me that the zapper could be causing it. But it only lasted a day. It's possible that it's actually reacting with the metal in the tissue of our mouth. Which would be just as bad and would explain why my gums have gotten so bad lately.