If your well water has high iron content, then it could be the cause of your mental illness. Taking iron supplements has caused iron deficiency. Drinking iron water is like taking iron supplements, lots of supplements.
The solution is dangerous. Taking copper supplements to counter the iron intake and copper deficiency. Taking copper supplements has caused serious health problems. It's best to get your copper from food.
When the iron intake goes up, the copper goes down. When the copper goes down histamine increases. If the histamine can get high enough, it will cause mental problems.
Testing and fixing your copper balances should only be done with a doctor.