i recently discovered pronounced horizontal lines across my fingernails.....there is a very thinck line and a few thin ones below it, on each nail. i don't know what this means, but i have seen similar lines on CSI when it was said that the person who had these lines was being slowly poisoned by arsenic....COULD I BE BEING POISONED? WHETHER ACCIDENTALLY OR PURPOSELY? ESPECIALLY CONSIDERING I HAVE BEEN HAVING STOMACH CRAMPS, CHEST PAINS, EXHAUSTION, AND POSSIBLE DEPRESSION SYMPTOMS?