You mentioned taking magic mushrooms, for example, as comparison to my schizophrenia... I should mention that having a being telepathically communicating with you is not like any drug, at all. But it's not as strange as you might think, it could happen and you wouldn't be very freaked out by it, because you realise:
1) we communicate all the time, with physical plane people, but our communication (eg in poetry and art) is not necessarily simple at all
2) the nature of the entire mind is telepathic, and you've been telepathically communicating the whole time, but you possibly didn't formally recognise it
... later 3) when you read about mystics and religious saints and psychic mediums you realise humans have been doing this for thousands of years
I once told a psychiatrist who was telling me about the mechanism of action of an anti-psychotic (a serotonin agonist) that I had taken a serotonin stimulant (ecstasy) and that the effects of it were nothing like my symptoms. He seemed somewhat perturbed.