What was i drugged with, and how?

I don't know if you were drugged or what with. Definitely not proud of it but I have done the same type of thing from drinking too much alcohol. Dehydration can cause you to do things you normally wouldn't if it is severe enough. I've also had a similar experience after being in the hot sun after taking a new medication. Also this could have been a chemical imbalance in your body due to something you ate hours or even a day before the concert, stress, depression, or any combination of things including chemicals produced by your body due to your menstrual cycle. Lets hope it doesn't happen again but if it does you need to try to figure out what may have been different than normal that day. P.S. I know you don't want to hear this but maybe your boyfriend slipped you something. Don't think it is not possible because I never thought it would be possible for me to get a divorce from the love of my life but after 20 years she must have been tired of me cause she divorced me after having another guys kid. Keep your eyes open even on your boyfriend!!!