It does sound like skittishness/fearful behavior. The good news is that this can be helped somewhat, although it may never be completely resolved depending on her genetic nerve strength/temperament. Take your dog to obedience classes so you can teach her commands as a way of putting all her decision making in your hands as well as build her confidence. Agility would be great for confidence building. Read up on clicker training as well, another major confidence-booster and fun way to train!