I think it is every pregnant woman's fear, to be up front with you.
Do what you need to do to make it through emotionally and psychologically. One thing that has helped me not to obsess over the fear of miscarriage is to realize that its beyond me. I have no control over my future. The only thing I have control of is that I love my baby today and I'm going to spend the day enjoying my pregnancy.
I eat well, exercise (or try when I'm not hugging the toilet), and do my best to stay hydrated. Beyond that its all beyond me. I can pray and hope. That's it.
I hope you are able to enjoy your pregnancy today and you don't worry yourself sick. Sending you warm E-hugs. Focus on today!