I've not done any research on CBD, but I'd be wary of trying it. I especially wouldn't take up vaping if you don't already do it. There are other delivery methods that would probably be less harmful for you.

Have you looked into therapy techniques for dealing with your voices and anxiety? Also, as Finding mentioned, bupropion/Wellbutrin can exacerbate psychosis, and it also frequently worsens anxiety. In terms of D2 antagonism, seroquel/quetiapine isn't that strong of an AP, so you might find another one of more benefit.

All the best,

*Willow*