Yeah dude, I had a really really bad shroom experience and I had a hard time coming back doing any sort of drug. It's pretty much just paranoia and your brain fucking with you. Like if you eat a lot of something you like until you get really sick and start puking, you're not going to want to eat that for awhile. Just come back to it slowly and take a few hits and relax until your body can do it again comfortably.