Ok, first off, anything synthetic(which is most bottled vitamins) in excess is bad...the iron and zinc, for example, although good, can cause problems in excess. Herbs...well, I'm leery of any that are not in the form of a mild tea like chammomile for example is ok.

I don't know if hallucinations are on the list of overdose of zinc and iron but it could be for other things like herbs. But who knows,lack of or imbalance of nutrition does effect our heads just like the body(the brain is an organ too).

So I'd say, take only one fish oil and maybe a cod liver oil(natural vit. A and D). Just take one not so many. Try a superfood drink for natural vitamin content or mix up berries in protein shakes for nutrition. A plain multi would be good for insurance but you don't need it everyday if you are using superfood and eating fairly well. Prune Juice(be careful of too much, can cause loose stools) is a great natural source of iron.

Try more food and food source(superfood powder; protein powders) for your vitamins and less reliance on synthetic versions and see if you don't improve on that. I wouldn't take so many herbs either, only ones that seem to help and don't overdo them or cut them out completely if you can.