This is not abnormal. The tooth undergoes trauma from the drilling and replacing of another material. I have heard of others experiencing post amalgam removal pain also. Just imagine the trauma it's subjected to and sometimes it takes time to heal too. This happened to me last year. I had some composites redone in cerec porcelain and one of my teeth started to hurt sometime after. Not straight away. And once it started, it would intensify and go on smetimes for most of the day. I was very concerned that the nerve maybe dying....I had to nurse my teeth and quit eating anything that made it worse.

I would advise you to be careful of what you eat (e.g. nuts etc), anything like that may apply that kind of pressure. The teeth may need time to settle (the nerve). I don't tend to get it anymore (cross fingers) and if anything starts up, I won't eat on that side, and/or I resort to softer foods.

I have heard of others having big problems from it and sometimes for months. But it's also a good idea to make sure everything is even. That your bite is even and you can bite properly, rather than feeling some of the materials in the teeth are too high and need to be filed down lower. Sometimes adjustments can help, but if it's not that, it maybe just post sensitivity and this is not uncommon.

If it has happened before to you with mercury poisoning, then this surge of symptoms and pain, maybe related to detoxing yes. I myself have had symptoms recur from my body starting to detox mercury and sometimes the strangest ones can return and intensify worse than before. But still nurse your teeth and be careful of what you eat! No nuts or seeds, or too hard foods. And chew on the better side of your mouth if you can (unless of course it's both sides).

I hope that things will settle in time.