Mercury hidden in teeth?

How would I know if i still have mercury below the white filling. I visited a holistic dentist who took xrays and told me i didnt but ive been using ALA at an increasing down for three months and am having an intense pulling sensation from the teeth the mercury fillings were in. I also feel like im getting worse, altough I do recognise this could be dump. Today im getting that brain burning sensation and feelings of madhatter syndrome. Has anyone had similar issues? Tweet