3rd baby and more scared than ever!

So this is my third baby, my first pregnancy was easy besides throwing up every day, my second was more difficult. I was in bed rest from high blood pressure and had to be induced at 37 weeks. Well my youngest who is 21 months doesn’t talk, at all. She will be starting speech therapy soon and is having to tested for autism. Well I feel so guilty for being pregnant and about to give birth. I’ve never left my youngest for more than a few hours and I’m her everything. Don’t get me wrong she loves her daddy but I’m the moon and stars for her. I’m so scared/ worried for labor this time. I’m not sure what to do to feel any better by it. Maybe it’s my nerves from having to leave my youngest over night or maybe it’s the fact that this isn’t my first rodeo so I know what could happen. Either way I’m scared.. ugh!! Sorry for this being so long I just needed to get this off my chest and to see if maybe possibly I’m not alone in being scared.