6.5 weeks and nervous

I am only 6.5 weeks along and I am so nervous.  I was pregnant earlier this year and had a missed miscarriage at 7.5 weeks. I am excited to be pregnant but find myself more nervous than anything. I don't really have any symptoms, just sore breasts. I have a little cramping but no bleeding. I am freaking out and ultrasound isn't until next week.  Anyone else been in my position with positive outcome? I am one worried mama!