I believe that we get anxious but do not always no what triggered the anxiety.
Sometime anticipatory anxiety is the cause which may have been you problem...............you were worrying about the event but not realizing until the last count down that the anxiety was going to flare and give you a physical sx.
Take care and keep posting.
Moderator Anxiety ~ Panic Disorders
*~* Not a mental health professional at all *~*
Dx: Anxiety/Panic, Depression, GERD, Osteoarthritis
*Wife of a Crohnie*