firstly hun

Huge Hugs

and secondly It will pass. She will settle in eventually and it wont be long before she is too busy to even give you a kiss goodbye.
All 3 of my kids were very similar for about a month of care and now well they couldnt care less if i was there or not and my youngest says bye to me before i have even signed the sign in book,

my best advice would be to limit the time spent in the morning. The longer you stay the harder it is for her.

Im sorry its so hard for you though and hope it gets better soon