I'll update and say that my daughter just moved up to a new room. She runs into the daycare happily, hugs her old teacher, hugs her new teacher, then clings to my legs and screams if I try to let her go.
I give her a hug, tell her I love her, and Mommy has to go to work and she needs to be a big girl at school, and leave.
Every single day for the past week she screams and throws herself on the floor as I leave. It's heartbreaking. But then when I come pick her up, she runs, gives me a hug, then runs away and hides so I can't take her home... Yesterday I had to stay and talk to the director outside the room. Within 2 minutes, she had stopped crying and was playing happily.