The first time I did shrooms it was a great experience, after I even felt more centered. After the second time (a year a half later) I did mushrooms there was a 2 week period in which I felt "smarter" but was actually completely paranoid and connecting dots that weren't there. This was during the presidential elections and I felt like I was actually a subject of the debates (remember Joe the Plumber?). I thought the government was after me but I completely followed every move of political tactics and ended up with a great standing for political science. I got through this temporary psychosis (two weeks or so) all by myself without any treatment even though there wasn't a single person in my life who I didn't question. This happened one week after a bad experience with salvia that brought out many anxieties in me I never had (fear of leaving my girlfriends house at night, death following me, falling asleep while driving etc.) During this time I had my girlfriend who was noticeably shaken and changed from the trip and a friend who was messing with me pretending to be a cop. A package sent to me filled with cannabis seeds set off my paranoia alarm because they were high quality seeds I never ordered, yet they were addressed to me from a very strange name in Napa Valley, CA
At the time my girlfriends mom urged me not to smoke at one point she forced me to get a mental evaluation, I did and the evaluator said I was perfectly fine and possible even in better mental shape then the average. However my father concurred and hypothesized that I had areas of my brain receiving more energy than normal.
For a month I didn't smoke any marijuana until it was completely out of my system - there hasn't been a time since this t-break where my tolerance to THC has returned the point where I'm not nervous and quiet around people after I smoke (prior to this I had a very high tolerance, the day after my first mushroom experience I out smoked everybody on 420 and could maintain composure).
I just did acid for the first time last week and although it started out great it ended up going bad, full of rapid thoughts of self doubts and ego-killing thoughts (this being brought on by an argument with my girlfriend, peep my first thread for more info). After the trip I stopped smoking for 48 hours until the LSD mostly cleared my system but now when I smoke I have more control, it doesn't hit me instantly and my highs remind me more of when I was first originally building my tolerance.