You might have been slipped something that has altered some of the chemical processes that cause your mind and bodies reactions to certain emotions and situations to react in a unfamiliar way because they may be damaged a little. EX can do this after only a one time use. It doesn't happen to everybody the first time, but it has the potential to destroy normal hormone functions in the brain.
I would try to stay away from any recreational drugs and try to get a hold of what is going on with you. You may need to look at your lifestyle, habits, exercise eating, start finding what does make you feel relaxed, music, games, a bike ride. Just try to chill and listen to your body.
This can be serious, my bro was slipped a Mickey and it messed with him and now if he tries to use any drugs he is about ready to slice his wrists even with just smoking bud. He isn't a teenager either, he is married, kid, new house good job making $30 a hour so he is a stable guy, but his mind just won't function right anymore when it gets thrown off balance by using anything.
Hope this helps some.