I'm sorry to hear that, but you honestly have no idea if the psychedelic actually caused it. Any number of environmental factors could be at play. No doubt that they will cause issues in some folks, but as the link I provided shows, there's no reason to think they will cause it at any greater rate than other factors we encounter daily.

Could be related to other drug use. Most trippers experiment with other stuff. Coke, alcohol, math and marijuana all can trigger psychosis.