Getting off Seroquel

I started taking Seroquel when i was 18 years old... I am now 23.... I started with 200 mg... then down to 100... and took 50 mg towards the end of 21 years old and 22 years old.... I stopted taking my seroquel as of mid November of 2010... im currently withdrawing and ...  it is very difficult... I tried herbs... valerian.... Melatonin (3 mg... 1.50 mg... 1 mg.. 0.50 mg..) and I have days of sleep and stressful nights of hell of no sleep.. If someone out there has a advice on my situation i would really appreciate there help!!! my Dr recommend i try Saphris 5mg at night... but im nervous... About a month ago i tried taking 50 mg of Seroquel again and i had this Horrific response!!! im to nervous to even try 25 mg..