I'm getting so nervous. I found a pediatrician for my little girl. The closer I'm getting to the end…

I'm getting so nervous. I found a pediatrician for my little girl. The closer I'm getting to the end of my pregnancy, the more I worry. My SO isn't really making it better. Last night he asked me what would happen between us if we lose her. In all honesty I don't know. I've had friends die on me and before I could stop them but...I don't think I'll be prepared for losing a child. I'm trying not to think about it but it's hard when my SO keeps asking me about it. I know he might be concerned for our relationship but still... you don't ask a pregnant woman about the death of her unborn child thinking it might happen. It's gotten me in deep depression to the point it's hard for me to not be fatigued. I'm sleeping more, losing energy, and I just am losing myself. I have this need to ask or even beg for help...