OK, i bought an eighth of dried psilocybian mushrooms. i have never done any other hallucinagen before. so just to test it out, i ate a single stem which couldn't have been more than 1/8 of a gram. i hadn't eaten in about 2 hours, it was about 10PM. after about a half-hour i began noticing some bright lights on a tree outside that were'nt actually there. it was a very mild experience and i felt pretty pleasant and dream-like. after a couple hours i felt very drained and had very discomforting abdominal pain until the next evening. it felt like i had a fever but i didn't take my temperature. there was no mold on the shrooms and i got them from a pretty reputable dealer. i have a low tolerance to cannabis too, one hit goes a long way for me. but why the discomfort?