Too Much of a Good Thing

I depend on Lithium to control my depression, but since the hospital episode I'm afraid to take it. (See previous post)
I can't sink back into the hell of depression. I can't. I won't.
This is what I found out about overdosing on Lithium. I was experiencing most of the symptoms. Why didn't my psych spot them?

Symptoms:

* Abnormal heart rhythms
* Breathing difficulties (x)
* Coma (x)
* Concentration difficulties (x)
* Confusion (x)
* Convulsions
* Drowsiness (x)
* Diarrhea (x)
* Increased thirst (x)
* Increased urine output
* Low blood pressure (x)
* Loss of appetite
* Muscle twitching (x)
* Rash
* Seizures
* Sluggishness (x)
* Slurred speech (x)
* Stupor (lack of alertness) (x)
* Tremors (x)
* Vomiting
* Weakness (x)
* Uncoordinated movement (x)