Tracy, i have Lorezepam for special occassions, when it gets too much, i would only take half of a dose.
The key is to get you amalgams out. You found a good dentist, he likes to do them in one go which in some cases could be better than doing it gradually.
feeling cold is a thyroid symptom but you dont want to do any testing until your amalgams have been removed.
My thyroid went very overactive quite a few years ago and i think it was my amalgam fillings which caused it, at the time i had no idea, anyway, i had to have my thyroid removed and now im on pills all my life.