Hair analysis is unreliable.

Hair tests for mercury toxicity are considered unreliable.
Swallowing a filling is not anymore dangerous than having it in your mouth and it is usually excreted in 24 hours.
Dizziness/vertigo is not a typical symptom of HG toxicity but Hg can affect people in different ways.
Usual symptoms are depression,anxiety,anger,emotional instability,sensitivity to light or sound,excess salivation,brain fog,etc.

YOU SHOULD HAVE YOUR MERCURY Amalgams REMOVED!

There is a good chance they are the cause of many of your problems.