Is your horse spooky inside the arena or on trails? (or all the time)
If she is spooky on trails, it's always a good idea to ask one of your friends at the barn with a self confident, calm horse, to join you. If there is a situation, your horse is afraid of, it can walk behind the other horse (if this horse doesn't spook, it will calm her down). If she gets more and more confident, you can start to ride her next to or in front of the other horse (then she has to face the spooky things first).
How old is your horse? I think that it's rather normal for unexperienced horses to be spooky from time to time.
In my opinion, important questions are: Are you a self confident, experienced rider? How do you behave, when she's spooky?
If you are frightend or tend to tense up, when she's spooky you have to work on yourself. Otherwise it won't work. You have to support her with your calmness and assertiveness.