She sounds pretty normal...mine was questioning the cardboard display at the pet store today. She figured out that it was okay after she smelled the treats it held. You just want to keep socializing her and taking her into different situations. If you find that she is showing signs of being afraid, approach whatever it is carefully from far away, gradually moving closer until she is good with it. This process can take minutes or days depending on what it is and how fearful she is. Your end goal is to have a dog that is not fearful and is confident and stable.