@Calliope: TL;DR: last two paragraphs. Well, no way to answer this concisely. Okay. First, my mistakes pre-trip, for potential reference.
I was around my childhood friends. Friends I was unaware I did not trust, which I learned the hard way, I did not. I'm talking people I viewed as brothers and sisters, consciously. A harsh lesson in delusion.
Second mistake. I took it at said friend's apartment: a place that was not excessively comfortable, to me.
Third mistake. I smoked weed before it hit. I can now no longer smoke weed, as it always causes a sort of flashback and sends me quivering in sheer terror in the corner of the room.
Fourth mistake: I asked my best friend if he wanted to watch me trip. He did not, but did so anyway, because he was a giant pussy afraid to tell the truth about how he felt about anything. He was angry that he had to deal with my unfunny trip. So, he drove me home while blasting DevilDriver--melodic death metal, very angry music.
Fifth and sixth mistake: which I alluded to. My mother is bipolar with psychotic episodes; and, I had a history of major depression. I did not research the substance and sought to use it in a time of instability as an escape. But hallucinogens are anything but escapes from reality.
All of these served to pile on top of the ill effects I received from the trip. Which, ended up being many psychotic and delusional symptoms. I feared greatly that my friends were planning my murder; I had thoughts about the potential of others having super powers of some sort and using them to conspire against me; I thought I had super powers of some sort that I just couldn't manifest properly; I experienced religious delusions and became a terrified Christian for a couple months; thought demons and the devil were after my soul.
Such and such. It took literally years to handle these effects and for them to subside. Not just during the trip, but years afterwards. I still have a few of these ideas that go around in my head from time to time, 8 years later; though, I have learned how to combat them with logic. My personality also shifted from wide-eyed puppy-like extrovert to distrustful introvert.