Baby's not ready to come😔

I'm 39+3 and I had a doctor's appointment today, he measured my belly and said that I'm measuring at 32 weeks. He also checked to see if my cervix was opened, it was closed. So I got some very disappointing news today. Now I have to go into the hospital tomorrow to get an ultrasound done to check her growth and to make sure she has enough fluid. I really don't want her to be late. I'm ready to meet her. 😔😕