Emotions are catching up?

I’m 20 weeks so I’m half way through, 4 months to go! Up until now I’ve been incredibly excited and ready. And now I just am getting more scared and panicky. And yes I know these feelings are normal, I’m aware it’s okay to feel this way, but I’m hoping maybe you guys could share birthing stories or encouraging stories that will get me feeling more excited again. Every time I think about giving birth my heart stops bc I know I will never know exactly what to expect and I just have an overwhelming feeling that something is going to happen, that I’m just not bound to have something good, ya know?