Hey Ms. B!

Good to see you here! Official psychiatry would probably agree with you. In fact, it was said to me by a psychiatrist, 'You can go back to being a medium, once you're fully functional' (I thought I was talking to spirits, still not sure what it was)
I had no idea how to go about it either. Only later learnt some general tips online.

Thing is, in traditional communities where they still have shamans and such, people get trained to deal with such states.. if one is untrained and doesn't have a clue what one is doing, well, it can get disruptive.. Consider watching trailer for Crazywise, the documentary. And there are some accompanying videos on YouTube. For many shamans/medicine men/oracles, it began as 'psychosis' and they only later learnt to not let it get 'disruptive' - through help of a mentor or grandparent or such

As for hallucinatory knowledge, one part from my final 'disruptive' 'psychosis'/vision did come true, as I later found out. Again, at the time I thought it was 'telepathy', later realized it was probably a 'vision' and to be taken in a metaphoric sense... I'm thinking maybe it got 'disruptive' because I fell into anger/'revenge' mode - any thoughts on this, Katie? There are probably 'rules' and 'tips' for trance-like states, it's probably better to steer clear of 'negative' emotions?

And from a 'scientific' point of view, maybe the myelin sheaths or dopamine receptors or other parts of the brain got under 'stress' of negative emotions (or previous inadequate nutrition, stress etc) and went into overdrive/caused an 'extreme'/disruptive state and occasional breaks with reality?
I'm just guessing... Apparently fasting or thirsting can also induce trance-like state, and I don't know if I was drinking water much/eating much that day...