Recently, I've also begun experimenting with microdosing. I know almost nothing about the science of psychedelics but I've heard that they mimic the chemical structure of serotonin. I've also had a couple of intense nightmares recently. I wonder if there's somehow a connection between the effect of serotonin or things like it and the tendency to experience intense imagery in dreams.
Perhaps it's not exactly the quality (negative or positive) of the content but the intensity that is magnified. I think I could just as well say that I've had a number of intensely positive dreams while taking these substances but I can't speak objectively about it.
Never got withdrawal symptoms from the first round some time ago, unless you call a second bout a withdrawal. Sleeping at night has become a bit of an adventure.
In my experience, all of these drugs can bring on intense very visually pleasant trippy dreams, with the occasional intense violent nightmare. Aside from the mood and sleep architecture effects, I wish I knew more about the neuroscience separating the positive from negative experiences.
After trying to quit cold turkey a couple of times, I researched about tapering strategies online, bought some pill cutters and started a very gradual dose reduction. So long as I only halved the dose every 2-3 days, I was fine. But I had to go down to a minuscule fragment of a pill before I could quit completely. Until that point, missing one of the reduced doses would still induce withdrawal symptoms just as intense as the full one had.