7 year old who is scared of everything?

I have a 7 year old daughter who is scared of pretty much everything. She is scared of the dark, animals in general, germs, noises in the night, monsters, being alone, the car crashing, being without her doll and going to school just to name a few. I have talked to her to try and work out why she is afraid and mostly it seems to be that she believes something very bad is going to happen to her or the rest of the family. I have tried everything I can think of to calm her but nothing seems to work. Do I need to be getting her help or is this just an overactive imagination?