I don't think you really wanted to go out on Halloween nite and simply felt obligated and when the anxiety started you felt you were not gonna let that stop you. I think that's bound to happen when we force ourselves to do some thing we really don't want to do. Then afterwords we feel bad because of the out come of it. I would still talk to your pdoc about it, but I don't think there is any thing terribly wrong with you! That could have happened to any one!