I have been taking Klonopin (clonazepam) for 26 years. I have slowly quit taking it over a 3 year span. Now, I am in withdraw and I was wondering how long I would be in withdraw? I have had SEVERE panic attacks, shakiness inside my body, and hot and cold chills, a stomache ache, but mostly I CAN NOT SLEEP. I have severe insomnia. Has anyone else experienced these things?