serequel medication and other antipsychotic meds danger and weight gain?

i just have started anxiety attacks and i suffer from depression and fibromyalgia. the dr recently placed me on serequel i am afraid of this med it causes life threatening side effects and weight gain i also take wellbutrin 300 mg with pain meds is there any antipsychotic meds not dangerous of your life and dosen't cause weight gain or antidepressants that don't cause weight gain thank you