Rach,Anxiety can absolutely present itself at a time when you feel there's nothing to be anxious about. You are not weak for using your medication and please know, like many of us, you will have many good days when anxiety doesn't even cross your mind and then out of the blue you will have a down day. Just remember you have beat it before and do not let anxiety rule your life.
You are a strong person and you will always make it through the "what if? " thinking.
Kindly,
Kitt