Look, it's good to know yourself. The probability of getting seriously messed by acid is extremely low, but the number one risk factor for a bad trip is being afraid of having a bad trip. Just don't worry about it and if someday you feel curious, just relax and do it. It sounds like you have a pretty good perspective.

Also, I will bet you that it wasn't (just) acid that fucked that girl up. Concerts are a great place to be exposed to all kinds of interesting substances.