> the next morning can be really depressing for your sérotonine vacuumed brain

Normal for any psycho-stimulant I'd say. Even alcohol. Some things are much worse for some people though, so I'd say as with all of these powerful things like mushrooms and MDMA; very occasionally for planned medicinal rather than recreational use. And with the right people, in the the right context, safe space, and some free days after to chill, reflect and detox.

I'd seek therapy to resolve that, maybe psychedelic integration therapy if the re-traumatization is an issue you've faced after having these experiences. I've been sending people to a clinic which has this as a focus - they definitely don't administer psychedelics but they do a pretty good at helping people who have gone through such difficult experiences. You can find practitioners who can help in your area through this site [1]

[1] https://psychedelic.support/