This is why it is do very very important to utilze a dentist that uses the Huggins protocol for removal and a comaptibility test for replacement. From what you are describing, you could very easily be having adverse reactions to BOTH the improperly removed mercury and the newly placed dental material. Please do not go back to this dentist and find a proper one with the right knowledge. In the meantime do everything possible to take the load off of your immune system.
Do not replace with gold or any other metal....you need a compatibility test.....another more drastic option is total removal of teeth.