Fear of disabled first born

Audrey • Wifey. Personal stylist. Soon to be Mama!
Please don't place judgement on me for sharing my thoughts... I'm only speaking my truth & trying to get some things off of my mind.
We are due with our first baby (a girl!!) in mid December.  Most days I am overwhelmingly excited & joyful.  However, the closer we get to our due date, the more fearful I become that something will be "wrong" with out daughter.  We will love her & feel lucky to care for her regardless of circumstance but I can't help feeling nervous about the practical challenges of parenting a child with special needs.  I've been extremely healthy/cautious during my entire pregnancy so my fear isn't that I have harmed her... Just that something unusual will happen.
Did anyone else experience this?  Just looking for some positive feedback & maybe advice to get these thoughts out of my head.