newly pregnant, first time, scared to death

Charis
Hi everyone. My spouse and I just found out that I'm pregnant... somewhere around 3 weeks, 4 days. We are over the moon, so excited. I'm also scared to death. This is our first pregnancy, that I know of, and there is a history of infertility in my family. I'm afraid that I'll have a "chemical pregnancy" or that I'll miscarry and we'll be heartbroken. I want to feel all the feelings (celebration, excitement, hope) but it's all clouded with fear and anxiety. I can't imagine feeling like this until the second trimester... 
I'd love encouragement, advice and words of wisdom from all you wonderful mamas and mamas-to-be, warrior-women and sisters. So thankful for this community. ❤