Is it normal to feel this way?

This is my first pregnancy and I’m 19.. I’m 23 weeks. I am excited, but it still feels fake to me.. no matter how many times I look at the ultrasound photos, I just can’t believe that there’s a baby in my belly & I’m going to be a mom.. I’m so scared. I read way too much into horror birth stories and chances of death while giving birth. Constantly thinking about how my body has never went through this before.. How will I know when I’m in labor? How will I know what it feels like? Will I be ok? I’m blessed and can’t wait, don’t get me wrong. But I’m also so so scared. 😢