If you don't mind me asking, what are the symptoms this psychiatrist diagnosed as "prodromal psychosis?" Starting taking an anti psychotic is a big step so you want to make sure you have tried other options and gotten advice from experts you can trust. This psychiatrist might just want to try this new diagnosis on you since recently there's been a push to attempt to catch psychosis earlier. Once you take the medication though, it will act on your brain chemistry and make it harder to withdraw and live without it?

While that holistic doctor might not have the best treatment option for you, maybe go to a second psychiatrist for another opinion? Have you tried therapy of any kind or an antidepressant? I don't know much about you, but it seems like both these doctors you have seen are making leaps without support.