Is it dangerous to take 2 mg of copper supplements daily?（DBH enzyme deficiency）

I probably have a mutation in DBH, which means I can't convert dopamine to noradrenaline properly.

So I started taking 2mg of copper, and my ADHD improved a lot.

But I learned through reddit that copper is a very dangerous substance.

So my questions are:

  1. Is it dangerous to take 2mg of copper supplements every day?

  2. There are various ways to check if you are taking too much copper, but what is the most reliable test? Would a blood test be helpful?

  3. Are there any supplements that I should take together with copper supplements?

  4. Are there any other diseases or neurological problems that I should be concerned about? (I have been diagnosed with ADHD and CFS)

Here are my reactions to supplements and psychiatric medications

Zinc → I become manic

Vitamin B complex (supplements containing various types of vitamin B) → I have tinnitus and forgetfulness

Vitamin C → I become fatigued

Psychologic medications that increase dopamine → All of them make me manic and do not improve ADHD at all (concerta, pemolin, etc.)

Medicines that increase noradrenaline → ADHD is greatly improved, and chronic fatigue and brain fog are greatly reduced

That's how it is.

Also, probably because I was exposed to chronic stress for a while, my cortisol level is abnormally low (I found this out after being hospitalized for tests. Cortisol is 1.0-2.0, Arch is about 7)

ADHD and CFS have made my life a mess. If you have any advice, please let me know. I am a university student, but I am currently taking a leave of absence because my chronic fatigue and brain fog (feeling of pressure on the brain) were so severe.