Lithium toxicity

I posted something similar on faceache too.  Just want to ask if anyone has experienced lithium toxicity? 
 
I went to my GP on 27/06 and struggled to explain what's been happening, that I had been stuttering, dizzy, feeling drunk, and had tremors in my hands for about a week he did a blood test.  He called me back later that day and told me my lithium level is 1.7.  Apparently the normal level is 1.0 and below!!  He said I've been suffering the effects of toxicity!  He instructed me to stop taking the lithium for 5 days and reduce my pregablin too as he thinks the combination of the lithium and pregablin are what caused the toxicity!
 
Anyway, having now stopped the lithium for 5 days, I'm getting more and more worried because my speech is stuttery at best.  I can't get more than 3 or 4 words out without really struggling.
im also having more severe CH's than usual.  (I have sunct and CH).  Currently my right eye and eyebrow feels like it's been hit by a cricket ball.
 
I have another appointment to see the GP again next week, (and another very supportive ouch member is coming with me to help in my fight for O2)
 

Meanwhile, can anyone who has suffered from toxicity or anyone who knows anything about it, please tell me how long the effects can last?
 
Thanks very much