This is a difficult one, and one that I struggled with. I had reached rock bottom when I had my fillings out - I was very fatigued, my adrenals were practically dead, and I was pretty much housebound. I got worse during amalgam removal and had to stop for a few months. this was despite good protection and only doing 1-2 fillings at a time. I had 12 amalgams and the removal process took 6 months.

With hindsight, I should have supported my adrenals and thyroid fully before embarking on the removal process. I got much better after a couple of months of taking cortisol and thyroid hormone, but I fear I damaged my adrenals more by removing my fillings without supporting them. I would definitely get your thyroid and adrenals tested before you start on amalgam removal, and support accordingly.
Obviously taking other supplements like milk thistle, vitamin C, zinc, fish oil (mercury free), magnesium, vitamin B complex etc etc will also support your body throughout the removal. Diet should also be tightly controlled, with little or no sugar.

I'm sorry you're in this position - it brings back horrible memories. As Tracy says, I wouldn't do it in one go - I think this is way too much for a weakened immune system to cope with. Slowly and surely does it, but support your endocrine system first.

Best
Nicola