I think that what you are experiencing in a way is a self-fulfilling prophecy. You are very nervous because of the terrible night you had and you that leads you to being nervous when you smoke. You are concerned with getting too high and experiencing those effects, so once you start smoking you concentrate solely on your experience and you end up causing yourself to have them again. Realize that these kinds of feelings can happen to everybody but its a once in a while thing. Kick back, relax, and enjoy the weed.