It could simply be your body reacting after having the Amalgam removed. No matter how careful, *some* mercury is liable to absorbed during the process. (It can easily take 6 months or longer to remove mercury from our systems.)
Have you started using chlorella, kelp, dulse, and cilantro since having the Amalgam removed? If you can't tolerate chorella, have you checked into chitosan?
Don't worry yourself too much. You're well on the way to regaining your health, no need to literally "worry yourself sick" over what is most likely just a detox process. =)