I am so nerves because having a miscarriage before makes me nerves and worry

Amy Renee • I am marry to a wonderful husband. Have 3 children. Had a miscarriage October 2013. And pregnant now due October 30.
I am so nerves because having a miscarriage before makes me nerves and worry. I just want my little peanut to be ok. We are praying. I go to the doctor Wednesday. I just want to see my baby on the ultrasound ad or hear the heart beat. My family ad I are very happy and excited.