Aww Jess this must be so hard...
I can sympathise... I had issues when Aidyn started daycare this year (he was about 19 months)
The first time he went I was called back after a few hours because he was just crying and crying.
The second time, he made it until just past lunch. And then gradually longer each time.

It is possible to introduce it to your DD in stages like this? Ie for the first week pick her up after 2 hours, the next week pick her up after lunch, the week after pick her up a bit later, etc?

I too have heard that its really common, but that certainly doesnt make it any less heartbreaking for you...
I wish you all the best and hope that she gets used to it soon.

ETA: argh, just realised you are working, so my suggestion wouldnt work. Is there perhaps any way that you would be allowed to do half days at work for a couple of days so that you can go and pick her up early, which may still help ease her into it in the long run?