Yep, I have been doing it quite some with psychedelics. The last trauma from childhood came in to my consciousness under a trip on HWBW. That came one week after I moved a little bit further away from everyone I knew. I moved away because the mushrooms "told" me earlier that I should do so. Im a little stoned so wont go so deep now because english is not my first language... But yes, experinece a little... I still "need" a trip once in awhile.
Its a lot about set and setting, you know? I got interested in stuff because of exactly this. It have given me insight about past, about my self and more about other people too.
I had an short fuse before. Or when Im tired now too. I noticed in my teens that I overreacted to certain situations. Then I realised that there has to be something more underneath. It sure was.
MDMA, LSD, shrooms, cacti etc all of the "classic" ones can help. Atleast for me
But I also ate amanitas, had good experince with Salvi D. too and so on
First time I ate shrooms I ate a little over a hundred fresh Liberty caps. Can definatly suggest a tripsitter, at least at heroic doses

And everyone should(!) start low the first times. To get to know it a little. We all react different. Its not for every soul.