If she was doing 'well' and took a turn for the worse with crying my first thought would be she is getting 'sick' children new to group childcare often end up with an ear infection or cold of some sort within their first month.

If this is her first time without mom there ~ separation anxiety for sure and in the beginning I am another 'hold them' if they need it while trying to show them its fun on the floor and engaged them ~ so I will do a cuddle and than sit them beside me and see if they will be ok ... than if they are I slowly inch away a bit to see how 'far' I can go with them being ok and so forth. Being new to child care is SCARY for infants and IMO they need that extra 'loving' to feel secure ~ once they are secure than you can work on the expectation that you cannot be holding them so much or sitting with them all the time.